... :Silicone 2.Size:different size 3.Used for glass bottle,pot,canister,tube, Pipe butyl rubber stopper 1. Material: 100% Food grade silicone 2 ... . Size: Different size3. Used for glass bottle, ceramic pot, canister, and other bottles.4 ... Road, Maqiao Industrial zone, Haining City, Zhejiang province, China Zip314419 butyl rubber stopper