raw material for rubber products are NBR, EPDM, NR. CR. BUNA, VITON, SILICON, SBR, IIR and etc. We have orings, oring-kits, oring splicing-kits, rubber cord, and other rubber parts;Material: Nbr 30, nbr 70, nbr 90, viton 70, viton 90, epdm, silicone, hnbr, cr, nr and so on; Type: 102pcs, 225pcs, 382pcs, 386pcs, 404pcs, 407pcs, 419pcs and so on