We supply hardware kits such as copper washer, hitch pin, cotter pin spring, e-clip, woodruf keys, nuts, screw, grease and so on;professional manufacturer of O-ring, O-ring Kit, Rubber Gasket, Rubber Cord, DIY Hardware tools, Extrusion Rubber Part for auto etc. The main raw material with PTFE,FFKM,CHEMRAZ,AFLAS;NBR, EPDM, NR. CR. BUNA, VITON, SILICON, SBR, and IIR.