... ,718,S136,8407,NAK80,SKD61,H13, etcHardness of steel46~56HRCMaterial for Slider ,Lifter and all sub insert use1.2767 HRCCavitySingle-cavity ... and plastic parts. Our parts main include molded rubber parts, Extrusion silicone tube/strip, Injection plastic parts, Extrusion plastic parts, PVC dipping, The main rubber raw material ...