1.100%silicone rubber. 2.FDA,LFGB,SGS,ROHS approved. 3.Eco-friendly,waterproof. 4.Heat resistant. 5.Silicone sealing plug Silicone Sealing Plug :Silicone sealing plugFeatures :1.100% high quality food-grade silicone rubber .2.Certifications:FDA,SGS,LFGB,ROHS.3.Eco-friendly,waterproof and healthy.4.Heat resistant , withstand -40~+230 °C.5.Nonstick and durable and great tightness.6.Any color and ...