all kind of rubber products,such as ,O-ring,V-ring,combined ring, stopper,cap,cover,ball,gasket,flange,sheet,mats,parts, oil seal,TB oil seal ,SB oil seal ,TC oil seal ,SC oil seal, valve seal,rubber piston,mud pump,and drilling rig. Made of NBR,FPM,PU,EPDM,FAB,FKM,PMQ,ACM,PITE,PA and so on.