... .Size:different size 3.Used for glass bottle,pot,canister,tube, Pipe butyl rubber stopper 1. Material: 100% Food grade silicone 2. ... samples are available. StandardOrNonstandard:Style: Size and Color:Material: Nonstandardbutyl rubber stopperas your requests,drawings or samplesRubber(NBR,SI, Viton,EPDM ... Road, Maqiao Industrial zone, Haining City, Zhejiang province, China Zip314419 butyl rubber stopper