NBR EPDM etc O RING 1.Material:EPDM,SBR,viton etc 2.Precisely mold ... order welcomed 4.OEM/ODM NR NBR SBR EPDM O RING Materials advice silicone and rubber(EPDM,NBR,SBR,CR, ... QC systemexcellent chemical and physical property,high/low temperature resistance, oil and fuel, water, weathering and O zone resistance etc.Technical ... bag inside, strength carton outside,or as your request. Agricultural use O RING