✅Compatible with momcozy S9 / S12 / S9Pro / S12Pro: This wearable breast pump duckbill valve and diaphragm kit can perfectly meet the accessories you need when using S9 / S12 / S9Pro / S12Pro electric breast pump. The 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. | ✅Safe & Comfortable: Our breast pump parts made of transparent food-grade silicone, BPA free, it's a nice pump parts replacement, giving you peace of mind about your baby's milk. The soft-touch material provides comfort for breastfeeding and promotes effective pumping without causing irritation or discomfort. All AOTOFONT pump parts that come in contact with breast milk are BPA free, it's safe for you and your baby. | ✅Easy to Clean & Durable: Wash duckbill valve&silicone diaphragm after each use with warm soapy water and rinse well with clean water. Our material can be sanitized with water steam, boiling water or microwave-steam bags, please use boiling water/steam with a temperature of around 100°C (212°F). We recommend cleaning pump parts immediately after each use and replacing them every 2-3 months to maintain optimal function. | ✅10Pack Duckbill Valve & 4Pack Diaphragm: We have prepared a sufficient number of s12 pro replacement parts for new moms, they are lightweight and easy to carry. Which can be stored in any place where you need to use the breast pump, such as home, studio, office or your baby bags. Avoid embarrassment when accessories are lost or unusable, moms can spend their feeding life worry-free. | ✅Caring for New Mothers: We've committed our lives to provide the best breast pumps accessories and customer care, supporting every mother with the beauty of parenthood. Meet the needs of moms pumping without hassle, wherever they are. Please reach out to us if you have any doubt or suggestion about our products, we will assist you within 24 hours!