Silicone food grade seal silicone gasket:silicone rubber gasket O-ring gasket Features: 1) Silicone Seal is make from 100% medical grade silicone rubber. Non-toxic. 2) Kinds of size and color are available. 3) It can be sterilized under 300 degree celsius. Safe for using. 4) Vaulted design with good sealing function. 5) You are welcome to contact for more details. 6) Pls send me your drawing or sample when you have the new design need us to help. Packaging & Shipping Packing 100pcs/bag, 2000pcs/ctn, carton size: 46x38x25CM. Delivery 7 days Shipping By Courier like DHL, UPS, Fedex, TNT, EMS, By Air, By Sea