[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, helping to drain milk fully into the container without loss of suction. [Premium Material]: Made from food-grade silicone, these replacement pump parts are durable, leak-proof, BPA-free, soft, odorless, and skin-friendly for both 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 5–10 minutes. Avoid using hard brushes; clean with fingertips instead. 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 may vary by ±1–3 cm.