off The Shelf Medical Grade Silicone Duckbill One-Way Check Valve for Liquid/Gas Backflow Prevent. Customizable Design: Size, Shape, and Color can be customized to meet specific requirements. Medical Grade Material: Made from medical grade silicone, LSR, or rubber materials suitable for healthcare. FDA & ISO Certified: Certified by FDA, LFGB, ROHS, and SGS for safety and quality assurance. Versatile Applications: Used in medical devices, automotive, food packaging, and industrial fluid control. Precision Manufacturing: Utilizes own mold-making technology and clean room production since 1998. Low MOQ: Minimum Order Quantity starts from 1 piece for flexible purchasing. Fast Lead Time: Production completed within 15 workdays during peak and off-peak seasons.