NBR O Ring 1.Material:Silicone,NBR,NR,SBR,EPDM,IIR,CR etc 2.High durable and good sealed 3.Various features ... Ring1.Material:Silicone,NBR,NR,SBR,EPDM,IIR,CR etc2.High durable and good sealed3.Various features according to your ... waterproof,oil resistant,abrasion UV Ozone resistant,antifire,low-temperatureresistant,high-temperature resistant4.Any shape according your drawing5.Any hardness5.Innoxious ...