8PCS Flange Sizing Kit 15/17/19/21/24mm Flanges/Shield, Soft Silicone Flange Insert Compatible Momcozy/Spectra/Medela Breast Pump, Breast Pump Essential kit(with Nipple Rulers and Storage Bag)

Product Description

Momfree Flange Insert Set – Find Your Perfect Fit for Comfortable, Efficient Pumping

Pumping should never be painful. If you’ve experienced nipple discomfort, swelling, or low output, the issue may be an incorrect flange size. The Momfree Flange Insert Set helps you achieve a precise, comfortable fit so you can pump with confidence—whether you’re building a stash or feeding exclusively.

Designed for moms who use larger breast shields but need a smaller tunnel diameter, these silicone inserts create a customized fit that reduces friction, protects sensitive tissue, and supports better milk flow.

Key Features

4 Sizes for a Custom Fit

Includes 15mm, 17mm, 19mm, and 21mm inserts to help you find the exact size your body needs. Nipple size can change throughout your pumping journey—having multiple options means you can adjust as needed for consistent comfort.

Gentle, Food-Grade Silicone

Made from BPA-free silicone that is soft, odorless, and safe for contact with breast milk. The material is gentle on sensitive skin and won’t compromise milk quality.

Wide Compatibility

These flange inserts work with most popular breast pump brands and models. Whether you use a wearable pump or a traditional setup, the inserts fit securely inside standard flanges to create a snug, effective seal.

Sealing Design Preserves Milk Quality

The insert helps create a tight seal that minimizes air exposure during pumping. This helps maintain freshness and hygiene so your baby receives high-quality milk every time.

Easy to Clean

After each use, wash with warm soapy water and rinse thoroughly. For deeper cleaning, these inserts can be sterilized with boiling water or steam (up to 100°C / 212°F) without warping or degrading.

Why Flange Size Matters

Using the wrong flange size is one of the most common reasons for pumping discomfort and low output. During a pumping session, your nipple should move freely inside the tunnel without rubbing against the sides or feeling compressed. If you notice swelling, redness, or friction marks, it’s a sign that you need a different size.

The Momfree Flange Insert Set lets you test and adjust until you find the fit that feels right—so you can focus on feeding your baby, not managing discomfort.

What’s in the Box

Flange Inserts: 15mm / 17mm / 19mm / 21mm (4 sizes included)

Specifications

Material: Food-grade silicone, BPA-free

Sizes: 15mm / 17mm / 19mm / 21mm

Compatibility: Fits most standard breast pump flanges

Cleaning: Dishwasher-safe (top rack) or sterilizer-friendly

Made for Moms, by Moms

We know that every pumping journey is different. That’s why we’re committed to providing thoughtful accessories, clear guidance, and real support—so you can feel confident at every feeding. Whether you’re new to pumping or looking to improve your setup, Momfree is here to help you along the way.

If you have questions about sizing or compatibility, our customer care team is ready to assist.