1.Soft silicone set 2.Different color and size 3.Flat rubber gaskets quick supply 4.waterproof, ... : -100-300 celsius degrees3. Hardness: between 30-80 shore A4. Color: black, transparent, green, red, yellow, etc5. Certifications: all manufacturing processes ... : by sea by air, just as your request. 2011 hot silica gel flat bottle caps