This replacement silicone diaphragm and valve set is specifically designed for Momcozy S9 Pro and S12 Pro breast pumps. Made from high-quality food-grade silicone, these essential components ensure proper suction and milk flow during pumping sessions. Key features: • Compatible with Momcozy S9 Pro and S12 Pro models • Made from food-grade silicone material • Includes both diaphragm and valve components • Ensures proper pump suction and function • Easy to clean and maintain The set includes one silicone diaphragm and one valve, both crucial parts for maintaining the proper functionality of your breast pump. Regular replacement of these components helps maintain optimal pump performance and hygiene. The transparent silicone construction allows for easy inspection and cleaning. These parts should be thoroughly cleaned after each use and replaced periodically to ensure the best pumping experience.