---
product_id: 350784766
title: "21mm Silicone Flange Inserts for Spectra S1 S2, Medela Breast Pump Shields, Freestyle, Harmony, Sonata to Reduce 24mm Elastic Nipple Tunnel Down to 21mm; Also Fits Freemie 25mm Cups; 2pc/Each"
brand: "lozaeve"
price: "₩66674"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/350784766-21mm-silicone-flange-inserts-for-spectra-s1-s2-medela-breast
store_origin: KR
region: South Korea
---

# Optimizes milk expression efficiency Reduces 24/25mm flange to 21mm BPA-free, safe silicone material 21mm Silicone Flange Inserts for Spectra S1 S2, Medela Breast Pump Shields, Freestyle, Harmony, Sonata to Reduce 24mm Elastic Nipple Tunnel Down to 21mm; Also Fits Freemie 25mm Cups; 2pc/Each

**Brand:** lozaeve
**Price:** ₩66674
**Availability:** ✅ In Stock

## Summary

> 🍼 Upgrade Your Pump Game: Perfect Fit, Maximum Flow!

## Quick Answers

- **What is this?** 21mm Silicone Flange Inserts for Spectra S1 S2, Medela Breast Pump Shields, Freestyle, Harmony, Sonata to Reduce 24mm Elastic Nipple Tunnel Down to 21mm; Also Fits Freemie 25mm Cups; 2pc/Each by lozaeve
- **How much does it cost?** ₩66674 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/350784766-21mm-silicone-flange-inserts-for-spectra-s1-s2-medela-breast)

## Best For

- lozaeve enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** At just 39g per pair, these inserts are easy to carry and integrate into your pumping routine.
- • **Safe & Durable Silicone:** Crafted from BPA-free silicone, prioritizing your health and long-lasting use.
- • **Universal Compatibility:** Works flawlessly with Medela Spectra S1/S2, Freestyle, Harmony, Sonata, Swing-Maxi, and Freemie cups.
- • **Comfort Meets Efficiency:** Ensures proper nipple tunnel fit to maximize milk output while minimizing discomfort.
- • **Precision Fit for Small Nipples:** Seamlessly reduces standard 24/25mm flanges to a comfortable 21mm diameter for optimal pumping.

## Overview

LOZAEVE 21mm Silicone Flange Inserts are precision-engineered accessories designed to reduce standard 24/25mm breast pump flanges down to 21mm, enhancing comfort and milk expression for mothers with smaller nipples. Compatible with leading Medela and Freemie pump models, these BPA-free silicone inserts ensure a secure, hygienic fit that boosts efficiency and comfort during pumping sessions.

## Description

21mm Silicone Flange Inserts for Spectra S1 S2, Medela Breast Pump Shields, Freestyle, Harmony, Sonata to Reduce 24mm Elastic Nipple Tunnel Down to 21mm; Also Fits Freemie 25mm Cups; 2pc/Each

## Features

- LOZAEVE 21mm inserts compatible with Medela/Spectra 24 mm breast shields. It will reduce the 24mm shield nipple tunnel down to 21mm. Also fits Freemie 25mm cups to reduce it down to 21mm.
- Seamless Compatibility For Optimal Milk Expression: Suitable for nipple diameter 18-20mm(after a pumping session) , or measure the circumference of nipple base about 50.24 - 56.52mm before a pumping session.
- Great solution for small-nippled mothers using Spectra and Medela Freestyle, Harmony, Sonata, and Swing-Maxi pumps, Proper nipple tunnel fit is essential for comfort and efficient milk output.
- BPA free, made of silicone material.
- Maintain compatibility with most Breast pump shields on different brands, with they original 24/25mm detachable shields having this insert inside.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Weight | 39 g |
| Units | 1 Count |
| Brand | LOZAEVE |

## Product Details

- **Brand:** LOZAEVE
- **Special features:** Lightweight, Portable
- **Material:** Silicone
- **Material type free:** BPA Free
- **Number of Items:** 1

## Images

![21mm Silicone Flange Inserts for Spectra S1 S2, Medela Breast Pump Shields, Freestyle, Harmony, Sonata to Reduce 24mm Elastic Nipple Tunnel Down to 21mm; Also Fits Freemie 25mm Cups; 2pc/Each - Image 1](https://m.media-amazon.com/images/I/61LHYCR6MbL.jpg)

## Frequently Bought Together

- LOZAEVE 21mm Silicone Flange Inserts for Spectra S1 S2, Medela Breast Pump Shields, Freestyle, Harmony, Sonata to Reduce 24mm Elastic Nipple Tunnel Down to 21mm; Also Fits Freemie 25mm Cups; 2pc/Each
- LOZAEVE 19mm Silicone Flange Inserts for Spectra S1 S2, Medela Breast Pump Shields, Freestyle, Harmony, Sonata to Reduce 24mm Elastic Nipple Tunnel Down to 19mm; Also Fits Freemie 25mm Cups; 2pc/Each
- Medela Manual breast pump with Flex Shields Harmony Single Hand for More Comfort and Expressing More Milk

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**Shop now:** [https://www.desertcart.kr/products/350784766-21mm-silicone-flange-inserts-for-spectra-s1-s2-medela-breast](https://www.desertcart.kr/products/350784766-21mm-silicone-flange-inserts-for-spectra-s1-s2-medela-breast)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-03*