Material: NBR,EPDM,SI,FKM,CR,SBR,IIR,HNBR,ACM,FLS,AFLS ,PU ,etc Best Ring Technology Co., Ltd.(short ... Bushing, Rubber Boots, Rubber Tube, Polyurethane Products, TPU Products TPU, PTFE Seal, Molded Products Number of Employees: 301 - 400 People Number ... Test, Thickness Meter, Shore-A Hardness Tester, Optical Projector 2012 ptfe oil ring