... .square ring rubber Item namesquare ring rubberMaterialNBR,HNBR,EPDM,SILICONE,VITON,NR,CR,SBR,PUHardness30-100 shore ASizeCustomized/standard/ ... , Clear, etcTemperatureCommon: -20~100degree centigrade;NBR(-40~120°C),SILICONE(-30~250°C),VITON(-25~200°C)Special featuresnon-toxic ... our company , 2) we are specialized in manufacturing in silicone product , we can provide good quality and the best price to ...