【WIDE COMPATABILITY】：Our flange inserts can be compatible for momcozy’s latest models- Momcozy M9/M6/M5 wearable breast pump and Momcozy V2 hand-free breast pump. Our flange sizing kit is also engineered for a perfect fit with most 24mm Shields/Flanges, ensuring compatibility with leading brands such as TSRETE, Medela, Spectra, Elvie, , among others, offering a broad choice for almost every mother. Note: Excludes compatibility with 27-28mm shields. | 【 Various Size Option to Fit You 】 :We offer 4 different size for your choose-15/17/19/21mm. Size can vary throughout different breastfeeding stages, requiring different sizes of flange inserts for your breast pump.Correct size flange inserts help moms pump more comfortably and efficiently. | 【High Quality ,Safe and Comfortable】: Our Flange insert kits are crafty from food-grade silicone material ,BPA-free,providing you with the assurance to use it confidently. The soft-touch material provides a snug fit, promoting efficient pumping without causing irritation or discomfort. | 【 Easy to Clean】: Washing the pump inserts promptly after each use,hey can be sanitized using water steam, boiling water, or microwave-steam bags, ensuring a hygienic and durable pumping accessory.We recommend that replacing them every 2 months to maintain optimal functionality. | 【Package Content】:2pcs*15mm flange inserts in the package..Your satisfaction is our encouragement to pursue high-quality service and products, please reach out to us if there is something we can help, Our dedicated service team is committed to providing you with the best possible solution and ensuring your satisfaction.