1.Size: 20*9.1*5.5*6 2.Size detail: Taper*ID*Valve tip diameter*Height 3.Material: 20Cr(AISI5120) 4.TS16949 we sell OEM/ODM valve keeper,valve seat,valve spring retainer , valve cotter, engine parts with cold extrusion, CNC maching etcour products are exported to South America, North America, West Europe, the middle East and other countries all over the world, we have the professional sales team ...