[Specific Compatibility]: These duckbill valves are compatible with Elvie Stride Breast Pump and are not compatible with Elvie Double, Single, or original Wearable pumps. They are also compatible with Momcozy, TSRETE Wearable Pumps Cup, and Spectra CaraCup. [No-Gap, Same Suction Power as Original]: Duckbill valves feature no gap on valve tips, providing the same suction power as original pump parts. The silicone duckbill valve is designed to prevent back-flow of breast milk and helps drain milk fully into the container without loss of suction. [Premium Material]: These replacement pump parts are made of food-grade silicone material, BPA-free, soft, odorless, durable, leak-proof, and skin-friendly for mother and baby. [Easy to Clean]: Wash duckbill valves and diaphragm after each use with warm soapy water and rinse thoroughly. Sterilize by boiling or steaming at a temperature not exceeding 100°C (212°F) for 5 to 10 minutes. Avoid using hard brushes; use fingertips for cleaning. Color: Green Material: Silicone Package Contents: 4 x Duckbill Valves Note: Only the items listed above are included. Other products are not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.