{
  "schema_version": "compare-page.v2",
  "page_id": "replacement-parts-for-willow-breast-pumps",
  "url": "https://robotrunk.com/compare/want/replacement-parts-for-willow-breast-pumps",
  "title": "Replacement parts for Willow breast pumps",
  "question": "Which replacement parts fit a Willow breast pump?",
  "answer": "Willow Pump Willow Sync Flange Set 24mm (2-pack): Designed for Willow Sync pumps. Willow Pump Willow 360® Milk Container Insert Replacement Set (2-pack): The inserts snap right into Willow Milk Containers. Willow Pump Willow Sizing Insert Set: They are designed for the perfect fit and performance with Willow and make pumping more comfortable for mamas with smaller flange sizes. Willow Pump Willow 360® Container Set (2-pack): The containers are reusable and are an alternative to pumping directly into storage bags with the Willow pump. Willow Pump Willow Go® Pump Diaphragm Set (2-pack): For use only with the Willow Go pump. Willow Pump Willow Go® Container Duckbill Valve Set (2-pack): For use only with the Willow Go pump.",
  "kind": "breastfeeding supply",
  "market": "US",
  "generated_at": "2026-10-24T23:11:04.979Z",
  "columns": [
    "Pump compatibility",
    "Pack size",
    "Size"
  ],
  "notices": {
    "facts": "Every value in the table is a fact RoboTrunk checked, linked to the page it came from. A dash means no checked fact fills that cell.",
    "price": "Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live."
  },
  "cited_facts": [
    {
      "ref": "p1.f1",
      "product": "Willow Pump Willow Sync Flange Set 24mm (2-pack)",
      "field": "pack size",
      "value": "Sold as a 2-pack.",
      "stated_as": "Willow Sync Flange Set 24mm (2-pack)",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p1.f2",
      "product": "Willow Pump Willow Sync Flange Set 24mm (2-pack)",
      "field": "flange size",
      "value": "The flanges are 24mm.",
      "stated_as": "Willow Sync Flange Set 24mm (2-pack)",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p1.f4",
      "product": "Willow Pump Willow Sync Flange Set 24mm (2-pack)",
      "field": "compatibility",
      "value": "Designed for Willow Sync pumps.",
      "stated_as": "Willow Sync Flange Set 24mm (2-pack)",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p3.f1",
      "product": "Willow Pump Willow 360® Milk Container Insert Replacement Set (2-pack)",
      "field": "what is included",
      "value": "The set is a 2-pack of inserts.",
      "stated_as": "2-pack",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p3.f2",
      "product": "Willow Pump Willow 360® Milk Container Insert Replacement Set (2-pack)",
      "field": "sizes",
      "value": "It is offered in 21mm, 24mm and 27mm.",
      "stated_as": "21mm",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p3.f3",
      "product": "Willow Pump Willow 360® Milk Container Insert Replacement Set (2-pack)",
      "field": "compatibility",
      "value": "The inserts snap right into Willow Milk Containers.",
      "stated_as": "they snap right into your Milk Containers",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p4.f1",
      "product": "Willow Pump Willow 360® Container Set (2-pack)",
      "field": "what is included",
      "value": "The set is a 2-pack of containers.",
      "stated_as": "2-pack",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p4.f2",
      "product": "Willow Pump Willow 360® Container Set (2-pack)",
      "field": "sizes",
      "value": "It is offered in a 24mm size.",
      "stated_as": "24mm",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p4.f3",
      "product": "Willow Pump Willow 360® Container Set (2-pack)",
      "field": "compatibility",
      "value": "The containers are reusable and are an alternative to pumping directly into storage bags with the Willow pump.",
      "stated_as": "Willow is the only pump that gives you the flexibility to pump directly into spill-proof storage bags or our reusable Containers.",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p5.f3",
      "product": "Willow Pump Willow Go® Pump Diaphragm Set (2-pack)",
      "field": "compatibility",
      "value": "For use only with the Willow Go pump",
      "stated_as": "Exclusively for use with the Willow Go pump",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p5.f6",
      "product": "Willow Pump Willow Go® Pump Diaphragm Set (2-pack)",
      "field": "pack size",
      "value": "Sold as a 2-pack",
      "stated_as": "Willow Go® Pump Diaphragm Set (2-pack)",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p6.f3",
      "product": "Willow Pump Willow Go® Container Duckbill Valve Set (2-pack)",
      "field": "compatibility",
      "value": "For use only with the Willow Go pump",
      "stated_as": "Exclusively for use with the Willow Go pump",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p6.f6",
      "product": "Willow Pump Willow Go® Container Duckbill Valve Set (2-pack)",
      "field": "pack size",
      "value": "Sold as a 2-pack",
      "stated_as": "Willow Go® Container Duckbill Valve Set (2-pack)",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p8.f1",
      "product": "Willow Pump Willow Sizing Insert Set",
      "field": "Pack size",
      "value": "The sizing inserts come as a 2-pack.",
      "stated_as": "2-pack",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p8.f2",
      "product": "Willow Pump Willow Sizing Insert Set",
      "field": "Purpose",
      "value": "They are designed for the perfect fit and performance with Willow and make pumping more comfortable for mamas with smaller flange sizes.",
      "stated_as": "Designed for the perfect fit and performance with Willow, Sizing Inserts make pumping more comfortable for mamas with smaller flange sizes.",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    },
    {
      "ref": "p8.f3",
      "product": "Willow Pump Willow Sizing Insert Set",
      "field": "Available sizes",
      "value": "Sizes offered are 13mm, 15mm, 17mm, 19mm, 21mm and 27mm.",
      "stated_as": "Variant: 27mm | 10.99 USD | SKU S827",
      "source_type": "listing",
      "source_url": "https://willowpump.myshopify.com/products.json",
      "source_read_at": "2026-10-11T07:27:24.617Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "onewillow-com",
        "display_name": "onewillow.com"
      },
      "product_id": "gid://shopify/Product/7967832408157",
      "name": "Willow Pump Willow Sync Flange Set 24mm (2-pack)",
      "url": "/products/ucp/onewillow-com/7967832408157",
      "why": "Designed for Willow Sync pumps.",
      "cells": [
        {
          "column": "Pump compatibility",
          "fact": {
            "field": "compatibility",
            "value": "Designed for Willow Sync pumps.",
            "stated_as": "Willow Sync Flange Set 24mm (2-pack)",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Pack size",
          "fact": {
            "field": "pack size",
            "value": "Sold as a 2-pack.",
            "stated_as": "Willow Sync Flange Set 24mm (2-pack)",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Size",
          "fact": {
            "field": "flange size",
            "value": "The flanges are 24mm.",
            "stated_as": "Willow Sync Flange Set 24mm (2-pack)",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "onewillow-com",
        "display_name": "onewillow.com"
      },
      "product_id": "gid://shopify/Product/3792177889373",
      "name": "Willow Pump Willow 360® Milk Container Insert Replacement Set (2-pack)",
      "url": "/products/ucp/onewillow-com/3792177889373",
      "why": "The inserts snap right into Willow Milk Containers.",
      "cells": [
        {
          "column": "Pump compatibility",
          "fact": {
            "field": "compatibility",
            "value": "The inserts snap right into Willow Milk Containers.",
            "stated_as": "they snap right into your Milk Containers",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Pack size",
          "fact": {
            "field": "what is included",
            "value": "The set is a 2-pack of inserts.",
            "stated_as": "2-pack",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Size",
          "fact": {
            "field": "sizes",
            "value": "It is offered in 21mm, 24mm and 27mm.",
            "stated_as": "21mm",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "onewillow-com",
        "display_name": "onewillow.com"
      },
      "product_id": "gid://shopify/Product/6552686755933",
      "name": "Willow Pump Willow Sizing Insert Set",
      "url": "/products/ucp/onewillow-com/6552686755933",
      "why": "They are designed for the perfect fit and performance with Willow and make pumping more comfortable for mamas with smaller flange sizes.",
      "cells": [
        {
          "column": "Pump compatibility",
          "fact": {
            "field": "Purpose",
            "value": "They are designed for the perfect fit and performance with Willow and make pumping more comfortable for mamas with smaller flange sizes.",
            "stated_as": "Designed for the perfect fit and performance with Willow, Sizing Inserts make pumping more comfortable for mamas with smaller flange sizes.",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Pack size",
          "fact": {
            "field": "Pack size",
            "value": "The sizing inserts come as a 2-pack.",
            "stated_as": "2-pack",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Size",
          "fact": {
            "field": "Available sizes",
            "value": "Sizes offered are 13mm, 15mm, 17mm, 19mm, 21mm and 27mm.",
            "stated_as": "Variant: 27mm | 10.99 USD | SKU S827",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        }
      ]
    },
    {
      "rank": 4,
      "merchant": {
        "slug": "onewillow-com",
        "display_name": "onewillow.com"
      },
      "product_id": "gid://shopify/Product/3792104390749",
      "name": "Willow Pump Willow 360® Container Set (2-pack)",
      "url": "/products/ucp/onewillow-com/3792104390749",
      "why": "The containers are reusable and are an alternative to pumping directly into storage bags with the Willow pump.",
      "cells": [
        {
          "column": "Pump compatibility",
          "fact": {
            "field": "compatibility",
            "value": "The containers are reusable and are an alternative to pumping directly into storage bags with the Willow pump.",
            "stated_as": "Willow is the only pump that gives you the flexibility to pump directly into spill-proof storage bags or our reusable Containers.",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Pack size",
          "fact": {
            "field": "what is included",
            "value": "The set is a 2-pack of containers.",
            "stated_as": "2-pack",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Size",
          "fact": {
            "field": "sizes",
            "value": "It is offered in a 24mm size.",
            "stated_as": "24mm",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        }
      ]
    },
    {
      "rank": 5,
      "merchant": {
        "slug": "onewillow-com",
        "display_name": "onewillow.com"
      },
      "product_id": "gid://shopify/Product/6705010212957",
      "name": "Willow Pump Willow Go® Pump Diaphragm Set (2-pack)",
      "url": "/products/ucp/onewillow-com/6705010212957",
      "why": "For use only with the Willow Go pump",
      "cells": [
        {
          "column": "Pump compatibility",
          "fact": {
            "field": "compatibility",
            "value": "For use only with the Willow Go pump",
            "stated_as": "Exclusively for use with the Willow Go pump",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Pack size",
          "fact": {
            "field": "pack size",
            "value": "Sold as a 2-pack",
            "stated_as": "Willow Go® Pump Diaphragm Set (2-pack)",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Size",
          "fact": null
        }
      ]
    },
    {
      "rank": 6,
      "merchant": {
        "slug": "onewillow-com",
        "display_name": "onewillow.com"
      },
      "product_id": "gid://shopify/Product/6705010245725",
      "name": "Willow Pump Willow Go® Container Duckbill Valve Set (2-pack)",
      "url": "/products/ucp/onewillow-com/6705010245725",
      "why": "For use only with the Willow Go pump",
      "cells": [
        {
          "column": "Pump compatibility",
          "fact": {
            "field": "compatibility",
            "value": "For use only with the Willow Go pump",
            "stated_as": "Exclusively for use with the Willow Go pump",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Pack size",
          "fact": {
            "field": "pack size",
            "value": "Sold as a 2-pack",
            "stated_as": "Willow Go® Container Duckbill Valve Set (2-pack)",
            "source_type": "listing",
            "source_url": "https://willowpump.myshopify.com/products.json",
            "source_read_at": "2026-10-11T07:27:24.617Z"
          }
        },
        {
          "column": "Size",
          "fact": null
        }
      ]
    }
  ]
}