NBR o ring 1,Material:NBR, silicon etc. 2,Size & Color:The same ... design. 3,OEM is welcome. 4,MOQ:5000pcs. NBR/FKM /EPDM O Ring Details:1. Material: Silicone, rubber, FKM, NBR, and NBR ... range: -40 to 230 degree Celsius 4. Performance: With good sealing, water resistance, oil resistance, anti-aging, insulation, nontoxic, tasteless, etc ...