... 3,NBR,VITON,KFM,SILICON,EPDM. 4,make O-rings by customer`s drawing o ring seal kit1. Material: NBR, EPDM, MVQ(Silicon rubber ... ), VITON.etc2.We also make O-rings by customer`s ... have various specification and More than 4000 sets standard size O-ring tool.4.Different color is available5.Characteristics:high/low temperature ...