12Pcs Duckbill Valves Clear Silicone for Hands Free Pumps Momcozy V1 / V2

12 Duckbill Valves. For, boil or steam at temperatures ≤100 Celsiusfor 5-10 minutes. Avoid microwave. Because the unpaid dispute will not be closed automatically, and we may ignore it. We'd like to settle any problem in a friendly manner.