[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 and 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. Can be sanitized using boiling water or steam at a temperature not exceeding 100°C (212°F) for 5–10 minutes. Avoid hard brushes; use fingertips for cleaning. Color: Green Material: Silicone Package Contents: 4 x Duckbill Valves Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3 cm.