---
product_id: 404540152
title: "18mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 18mm"
brand: "durceler"
price: "¥5099"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/404540152-18mm-silicone-flange-inserts-compatible-with-medela-for-spectra-s1
store_origin: JP
region: Japan
---

# Maximized Milk Expression Seamless Compatibility Nipple Protection 18mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 18mm

**Brand:** durceler
**Price:** ¥5099
**Availability:** ✅ In Stock

## Summary

> Pump with Confidence! 💪

## Quick Answers

- **What is this?** 18mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 18mm by durceler
- **How much does it cost?** ¥5099 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/404540152-18mm-silicone-flange-inserts-compatible-with-medela-for-spectra-s1)

## Best For

- durceler enthusiasts

## Why This Product

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

## Key Features

- • **Hands-Free Ready:** Compatible with most hands-free bras for ultimate convenience.
- • **BPA-Free Silicone:** Safe, durable, and designed for your peace of mind.
- • **Enhanced Milk Output:** Achieve optimal milk expression without discomfort.
- • **Perfect Fit for Comfort:** Transform your pumping experience with a snug fit for small nipples.
- • **Universal Compatibility:** Works with Medela, Spectra, Elvie, and more—one solution for all!

## Overview

The Durceler 18mm Silicone Flange Inserts are designed to reduce the nipple tunnel size from 24mm or 25mm to 18mm, ensuring a comfortable and efficient pumping experience for mothers with smaller nipples. Made from BPA-free silicone, these inserts are compatible with a wide range of breast pump brands, providing a seamless fit and maximizing milk expression while minimizing nipple trauma.

## Description

18mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 18mm

## Features

- Durceler 18mm inserts (2pcs a Pack) to compatible with Medela / Spectra / Elvie / S18 S21 S23 / Momcozy S9 Pro S10 S12 Pro / TSRETE / Bellababy / NCVI 24 mm breast flanges/shields. It will reduce the 24mm shield nipple tunnel down to 18mm. Also compatible with Freemie 25mm cups to reduce it down to 18mm. Also applicable to most other brands of the models for 24-25mm.
- Seamless Compatibility For Optimal Milk Expression: Suitable for nipple diameter 16-17mm(after a pumping session), or measure the circumference of nipple base about 43.96 - 47.10mm before a pumping session.
- Great solution for small-nippled mothers using large breast shields, Proper nipple tunnel fit is essential for comfort and efficient milk output. It can be compatible with Spectra and Medela (Freestyle, Harmony, Sonata, and Swing-Maxi pumps) and other brands.
- BPA free, made of silicone material. Durable, clear, and comfortable. This accessory helps breast shields for more effective pumping and maximized milk expression while helping to avoid nipple trauma or irritation.
- Maintain compatibility with most handsfree bra. You can use most handsfree bra cups with they original 24/25mm detachable shields having this insert inside. During operation, you need to squeeze slightly to make the Insert fully fit with the shield to achieve the perfect effect.

## Product Details

- **Brand:** Durceler
- **Special Feature:** Bpa Free
- **Material:** Silicone
- **Included Components:** Breast Flange
- **Number of Items:** 2

## Images

![18mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 18mm - Image 1](https://m.media-amazon.com/images/I/413W40kuafL.jpg)

## Questions & Answers

**Q: Does it work with the Elvie stride**
A: yes, it's fit for 24-25mm flanges of the Elvie stride

**Q: Does this work with mommed wearable pump?**
A: yes, it's ok for 24-25mm flanges work with mommed wearable pump

## Frequently Bought Together

- Durceler 18mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 18mm
- Maymom 18mm Flange and Duckbill Valve Compatible with Spectra S1 Spectra S2 Spectra 9 Plus Not Original Spectra Pump Parts Replace Spectra S2 Pump Parts Spectra Flange Spectra Duckbill Valve
- Momcozy Hands Free Pumping Bra, Adjustable Breast-Pumps Holding and Nursing Bra, Pumping & Nursing Bra in One

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**Shop now:** [https://www.desertcart.jp/products/404540152-18mm-silicone-flange-inserts-compatible-with-medela-for-spectra-s1](https://www.desertcart.jp/products/404540152-18mm-silicone-flange-inserts-compatible-with-medela-for-spectra-s1)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-20*