[Specific Compatibility]: These duckbill valves are for Elvie Stride Breast Pump, NOT compatible with for Elvie Double/Single/for- Wearable pump. They are also for Momcozy / TSRETE Wearable Pumps Cup / Spectra CaraCup. [No-Gap, Same Suction Power as old]: Duckbill valves without gap on valve tips Same suction as orignal-pump parts. Silicone duckbill valve designed to prevent back-flow of breast milk, help to drain breast milk to the bottom of container, no loss of suction. [Premium Material]: These replacement pump parts are made of food-grade silicone material, durable, no leaking, BPA free, soft and odorless, skin-friendly for mommy and baby. [Easy to Clean]: Wash duckbill valves and diaphragm for momcozy m5 after each use with warm soapy water and rinse well. Please use boiling water/steam, with a temperature of less than equal 100℃(212℉)for 5-10mins. Hard brushes is not recommended, please use finger tips instead. Colour:Green Material:silica gel Package Contents: 4 * Duckbill Valves Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.