【Perfectly Compatibility with Momcozy M9】：Our duckbill valve and diaphragm kit have the same suction as the original M9 pump parts without any gap issues. They can perfectly meet the accessories you need when using M9 wearable breast pump and 100% compatible. (Attention ：External plastic parts of valve and diaphragm are not included) 【Efficient Work the same as Original】：These duckbill valves and diaphragms are designed to be the same as the original, providing the same suction power and pump working. These M9 replacement kit can effectively help you improve efficiency. Grab every drop of milk for a better breast-pumping experience. 【Better Sealing&Anti-Backflow】:The silicone diaphragm is used to help the breast pump maintain the seal to prevent milk leakage. Silicone Duckbill valve can be used to drain milk to the bottom of the containeris and prevent back-flow of breast milk. We have prepared sufficient number of Momcozy M9 replacement parts for new moms, they can spend their feeding life worry-free. 【Safe Food Grade Silicone】:M9 breast pump part kits are made of soft silicone materials, durable, BPA-free, long-lasting performance for your pumping, ensuring the highest level of safety, giving you peace of mind about your baby's milk. 【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). Notice: If you notice that your pump seems to have lost suction, you need to change pump parts, Diaphragm and duck valves need to be replaced every 3 months. 0