... 3.We can accept orders against your requirements. 1. material:NBR,EPDM,SI,FKM(V270M),CR,SBR,IIR,HNBR,ACM,FLS ... . Y-Ring.U-Ring., Oil Seal,PU oil seals , rubber flat washers, rubber Circles, Gaskets, engine parts and accessories,compression mold , etc ... your requirement ,but o-ring's mold fee is free nbr rubber strip