... size 3.Used for glass bottle,pot,canister,tube, Pipe butyl rubber stopper 1. Material: 100% Food grade silicone 2. Size ... . Used for glass bottle, ceramic pot, canister, and other bottles.4. Advantages: safety, Eco-friendly, water proof, damp proof,and guarantee ... Road, Maqiao Industrial zone, Haining City, Zhejiang province, China Zip314419 butyl rubber stopper