The Momcozy Flange Insert 17mm for M5 Wearable Breast Pump is a soft silicone accessory designed to improve fit, comfort, and pumping efficiency for mothers who need a smaller flange size. It sits inside the standard M5 flange tunnel to create a more precise nipple fit, helping optimize suction performance while reducing discomfort, friction, and milk leakage. Made from BPA-free, food-grade silicone, it is safe, flexible, and gentle on sensitive skin. This insert is ideal for achieving a better personalized fit during daily pumping sessions.