... resistance and high vacuum resistance.2.Good electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, weather resistance ... quantity, deliver by sea. Delivery portShenzhenPaymentT/T, Western Union, 30% as deposit, balance before delivery or upon on receipt, ... and high temperature resistancesilicone o ring food grade in mechanical parts HNBR FKM FPM VITON A VITON B ...