An o-ring is a torus, or doughnut-shaped ring, generallyâ molded from an elastomer, although o-rings are also made â from ptfe and other thermoplastic materials, as well as metals, both hollow and solid. // Materials:epdm, nbr, sbr, cr, fkm, pu, silicone, hnbr, aem, acm, xnbr, nr, iir, ptfe and so on// Temperature:nbr(-40~120â°c), ffkm(-20~320â°c), viton(-20~200â°c), silicone (-70~220â°c), epdm(-50~150â°c), pu(-40~90â°c)// Hardnessï¼?30~90 shore a// Applicationsâ : The o ring mainly apply for â electrical appliances, automobile and motorcycle accessories, cylinder, hydraulic press, oil pump, sanitary ware, bearing, antenna waterproof, lighters and â other materials which require with the charaters of â friction resistance, oil resistance, resistance to nonpolar solvents, good airtight performance ect. We can produce kinds of standard and non-standard rubber o ring, so customized drawing is accepted.If you are interested in our products, please contact with us. -