... 3.Used for glass bottle,pot,canister,tube, Pipe rubber stopper for test tube 1. Material: 100% Food grade ... Style: Size and Color:Material: Nonstandardrubber stopper for test tubeas your requests,drawings or samplesRubber(NBR,SI, ... Viton,EPDM, etc.)FOB Port:Shanghai/ NingboPlace of Origin:Zhejiang China (Mainland)Application:used in different ... province, China Zip314419 rubber stopper for test tube