... whole set of the product anti-shock,slip-resistance,dustproof,protection Nbr/cr/nr/epdm/silicone/viton ... punch, extrusionFunctionShock absorption, buffer,oilproof,protection,aging resistance,wear resistance,pressure resistance,anti-slip,waterproofCertificateISO and FDAUse inRunning machine,auto ... 50% in advance and then finished before delivery Material NR,NBR,SBR&etc Advantage Anti-shock,durable, ...