【Wide Compatibility】: Our flange sizing kit are suitable for almost all breast pumps, Compatible for Momcozy m9/m6/m5/S12 pro/ V1 pro/V2 pro, also available for eufy E10 S1 S1 Pro/Spectra/Medela/TSRETE/Lasionh/Nuliie/NCVI/Paruu/NaNaLazy/MOMMED wearable breast pump,Reduce 24mm Nipple Tunnel Down to correct size. 【Customized Comfort】:Nipple size may change during different breastfeeding stages, requiring different sizes of inserts.Experience ultimate comfort with our silicone Flange Inserts featuring multiple size options (13mm, 14mm, 15mm, 16mm,17mm, 18mm, 19mm, 20mm, 21mm, 22mm). Find the perfect fit for your unique needs and enjoy a cozy pumping experience. ( tips:If you are not sure about your size, please choose our 10PCS Flange Inserts so that you can pick the right size for yourself.) 【Engineered for enhanced pumping efficiency】: our soft silicone inserts are designed to minimize discomfort while maximizing milk output. The comfortable and soft silicone material is designed to stimulate milk flow and increase comfort during use.With the added benefits of reduced pain and increased milk output, Achieve enhanced breast pumping, reduce pumping time, and maximize milk production by using the essential flange inserts for your breast pump. 【Supply Safe and Comfort Pumping】:Crafted from frosted transparent food-grade silicone,our flange inserts are BPA-free, ensuring the safety of both you and your baby. The soft-touch material provides a snug fit, promoting efficient pumping without causing irritation or discomfort. 【Easy To Use & Clean】: Wash parts after each use with warm soapy water and rinse well. Please use boiling water/steam, with a temperature of around 100°C (212°F). Tips: The nipple size is different during different breastfeeding periods, it is suggested that moms use a new Flange insert every 1-2 months. 0