... specially produce the o-ring,x-ring.rubber parts 2. Material: FFKM,NBR, HNBR,EPDM,SI,FKM(VITON)CR,PU,PTFE ... ,ACR(A) 1. material:NBR,EPDM,SI,FKM(V270M),CR,SBR,IIR,HNBR,ACM ... . Main products: O-Ring.X-Ring V-Ring.R-Ring. Y-Ring.U-Ring., Oil Seal,PU oil seals , rubber flat ... Test, Thickness Meter, Shore-A Hardness Tester, Optical Projector rubber y shape ring