... sealing components, the basic products are: O-Ring.X-Ring V-Ring.R-Ring. Y-Ring.U-Ring., Oil Seal,PU oil seals , rubber flat washers, rubber Circles ... , Rotary Oil Seal Test Bed,Rubber Brittle Low-Temperature Test Bed, Aging Test, Thickness Meter, Shore-A Hardness Tester, Optical Projector 2012 ptfe oil ring