---
product_id: 383242427
title: "Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc"
brand: "maymom"
price: "¥4946"
currency: JPY
in_stock: true
reviews_count: 8
category: "Maymom"
url: https://www.desertcart.jp/products/383242427-maymom-flange-insert-21-mm-compatible-with-medela-and-spectra
store_origin: JP
region: Japan
---

# Reduces nipple tunnel from 24mm to 21mm BPA-free, food-grade silicone Dishwasher safe for easy cleaning Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc

**Brand:** maymom
**Price:** ¥4946
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your pump game—comfort and efficiency in every drop!

## Quick Answers

- **What is this?** Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc by maymom
- **How much does it cost?** ¥4946 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/383242427-maymom-flange-insert-21-mm-compatible-with-medela-and-spectra)

## Best For

- maymom enthusiasts

## Why This Product

- Trusted maymom brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Handsfree Bra Friendly:** Maintains compatibility with most handsfree bras, so you stay mobile and productive while pumping.
- • **Durable & Safe Silicone:** Crafted from BPA-free, food-grade silicone that’s gentle on skin and built to last through countless washes.
- • **Universal Compatibility:** Works flawlessly with Medela, Spectra, Momcozy, Ameda, Willow, Lansinoh, and more—your all-in-one flange upgrade.
- • **Boosted Pumping Efficiency:** Maximizes suction and milk extraction, ensuring you never miss a drop during your busy day.
- • **Precision Fit for Ultimate Comfort:** Seamlessly reduces 24mm flange tunnel to 21mm for a snug, pain-free pumping experience.

## Overview

The Maymom 21mm flange insert is a premium silicone accessory designed to reduce the nipple tunnel size of 24mm breast pump flanges to 21mm, enhancing comfort and pumping efficiency. Compatible with leading brands like Medela, Spectra, and Momcozy, it fits most handsfree bras and is made from BPA-free, food-grade silicone. Dishwasher safe and durable, this 2-pack insert is a must-have for millennial moms seeking a seamless, pain-free pumping experience without compromising on performance.

## Description

desertcart.com : Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc : Baby

Review: Enhanced Comfort and Efficiency: A Five-Star Silicone Flange Insert! - I am absolutely thrilled with this silicone flange insert that I purchased to use with my Medela Harmony manual breast pump. It has made my pumping experience significantly more comfortable and efficient. While it may pose some challenges when removing or inserting when dry, and cleaning can be a bit tricky, these minor inconveniences are overshadowed by the overall greatness of this product. Here's why it deserves a solid 5-star rating: 1. Perfect Fit and Enhanced Comfort: The silicone flange insert seamlessly fits into the factory flange of my Medela Harmony manual breast pump. This perfect fit provides a snug and comfortable seal during pumping sessions. It creates a cushioning effect and reduces discomfort, allowing for a more enjoyable and pain-free experience. 2. Improved Pumping Efficiency: This flange insert has significantly enhanced the efficiency of my pumping sessions. It helps to maximize suction and milk extraction, resulting in increased milk yield. The snug fit and optimal seal ensure that every drop of precious milk is collected, minimizing waste and saving time. 3. Minor Challenge with Removal and Insertion: It's worth mentioning that removing or inserting the flange insert when dry can be a little challenging. However, with a little practice and the use of water or a lubricant, this challenge can be overcome. Once you find the right technique, the benefits of improved comfort and efficiency make it well worth the effort. 4. High-Quality Silicone Material: The flange insert is made of high-quality silicone, which is safe, durable, and easy to clean. The material is gentle against the skin and ensures a hygienic pumping experience. While washing can be a bit challenging due to the insert's design, it is a minor inconvenience compared to the overall benefits it provides. In summary, this silicone flange insert is a game-changer for Medela Harmony manual breast pump users. Its perfect fit, enhanced comfort, and improved pumping efficiency make it an exceptional accessory. While it may require a little practice and patience when removing or inserting when dry, and cleaning can be a bit challenging, the overall benefits and performance of this flange insert are truly impressive. I highly recommend it to all breastfeeding mothers seeking a more comfortable and efficient pumping experience.
Review: True to Size for Manual or Electric Breast Pumps - Flange inserts that are your size are key in successful, comfortable pumping sessions. As always, do your research to find your correct size. The 19mm size was what I needed and they are a sturdy silicone type material that fit just right in the flange. They do not slip, they did not cause any loss in suction. They worked just as intended. Over many washes, these inserts did not warp or tear in any way.

## Features

- Maymom 21 mm inserts (Long) compatible with Medela PersonalFit/spectra 24 mm shields. It will reduce the 24-mm shield nipple tunnel down to 21 mm. Also suitable for Momcozy/LegendairyMilk/Tsrete Wearable 24mm silicone cups.
- Maintain compatibility with most handsfree bra - Based on the Medela PersonalFit system. You can use most handsfree bra with your original 24 mm detachable shields having this insert inside.
- Can be compatible with Spectra 24mm flanges, Ameda Purely Yours 25mm flanges, Ameda Mya Joy 25mm flanges, Willow 24mm flanges, Lansino 24mm flanges. Momcozy S9/S10/S12 Wearable Breastpump 24 mm cups (not for 27 mm cups)
- Also fits freemie 25 mm cup to reduce its nipple tunnel
- BPA free, made of food-grade silicone.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B098WW7FZV |
| Additional Features | Bpa Free,Wearable, Wearable |
| Best Sellers Rank | #3,156 in Baby ( See Top 100 in Baby ) #38 in Breast Shells & Nipple Therapy Products |
| Brand | Maymom |
| Brand Name | Maymom |
| Color | Semi-clear |
| Customer Reviews | 4.4 out of 5 stars 4,734 Reviews |
| Is Dishwasher Safe | Yes |
| Is the item dishwasher safe? | Yes |
| Manufacturer | Maymom |
| Material | Silicone |
| Material Type | Silicone |
| Number of Items | 1 |
| Product Style | insert 21mm |
| Size | 2 Count (Pack of 1) |
| Special Feature | Bpa Free,Wearable, Wearable |
| Unit Count | 2.0 Count |

## Product Details

- **Brand:** Maymom
- **Special Feature:** Bpa Free,Wearable, Wearable
- **Material:** Silicone
- **Number of Items:** 1
- **Color:** Semi-clear

## Images

![Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc - Image 1](https://m.media-amazon.com/images/I/41frMZBpKAL.jpg)
![Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc - Image 2](https://m.media-amazon.com/images/I/51cqboD718L.jpg)
![Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc - Image 3](https://m.media-amazon.com/images/I/51glVjVKhVL.jpg)
![Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc - Image 4](https://m.media-amazon.com/images/I/61EDvI0ykZL.jpg)
![Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc - Image 5](https://m.media-amazon.com/images/I/61ictp6BR-L.jpg)

## Available Options

This product comes in different **Pattern, Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Enhanced Comfort and Efficiency: A Five-Star Silicone Flange Insert!
*by D***C on July 7, 2023*

I am absolutely thrilled with this silicone flange insert that I purchased to use with my Medela Harmony manual breast pump. It has made my pumping experience significantly more comfortable and efficient. While it may pose some challenges when removing or inserting when dry, and cleaning can be a bit tricky, these minor inconveniences are overshadowed by the overall greatness of this product. Here's why it deserves a solid 5-star rating: 1. Perfect Fit and Enhanced Comfort: The silicone flange insert seamlessly fits into the factory flange of my Medela Harmony manual breast pump. This perfect fit provides a snug and comfortable seal during pumping sessions. It creates a cushioning effect and reduces discomfort, allowing for a more enjoyable and pain-free experience. 2. Improved Pumping Efficiency: This flange insert has significantly enhanced the efficiency of my pumping sessions. It helps to maximize suction and milk extraction, resulting in increased milk yield. The snug fit and optimal seal ensure that every drop of precious milk is collected, minimizing waste and saving time. 3. Minor Challenge with Removal and Insertion: It's worth mentioning that removing or inserting the flange insert when dry can be a little challenging. However, with a little practice and the use of water or a lubricant, this challenge can be overcome. Once you find the right technique, the benefits of improved comfort and efficiency make it well worth the effort. 4. High-Quality Silicone Material: The flange insert is made of high-quality silicone, which is safe, durable, and easy to clean. The material is gentle against the skin and ensures a hygienic pumping experience. While washing can be a bit challenging due to the insert's design, it is a minor inconvenience compared to the overall benefits it provides. In summary, this silicone flange insert is a game-changer for Medela Harmony manual breast pump users. Its perfect fit, enhanced comfort, and improved pumping efficiency make it an exceptional accessory. While it may require a little practice and patience when removing or inserting when dry, and cleaning can be a bit challenging, the overall benefits and performance of this flange insert are truly impressive. I highly recommend it to all breastfeeding mothers seeking a more comfortable and efficient pumping experience.

### ⭐⭐⭐⭐⭐ True to Size for Manual or Electric Breast Pumps
*by S***Y on September 16, 2025*

Flange inserts that are your size are key in successful, comfortable pumping sessions. As always, do your research to find your correct size. The 19mm size was what I needed and they are a sturdy silicone type material that fit just right in the flange. They do not slip, they did not cause any loss in suction. They worked just as intended. Over many washes, these inserts did not warp or tear in any way.

### ⭐⭐⭐⭐⭐ Using with Medela Freestyle cups
*by A***S on July 22, 2024*

Works great in Medela’s Freestyle hands-free cup pumps - makes it much more comfortable to use. If your existing pump shield is too narrow, these will actually be smaller than they are, so I wouldn’t use them in anything smaller than 24mm shields (they got too compressed in my 21mm cups so I can’t use them comfortably in those). Easy to wash!

## Frequently Bought Together

- Maymom Flange Insert 21 mm Compatible with Medela and Spectra 24 mm Shields/Flanges. Use with Medela Freestyle and Momcozy S9/S11/S12 to Reduce Nipple Tunnel Down to 21 mm; Fit Momcozy 24 mm Cup. 2pc
- Maymom MyFit 17 mm Shields Small; Compatible with Medela Breast Pumps-PersonalFit, Freestyle, Harmony, Maxi, Freestyle Flex Connector; Connect to Maymom Widemouth/Narrow Connector, 2pcs

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-06*