NBR o ring 1,Material:NBR, silicon etc. 2,Size & Color:The same as your design. ... 3,OEM is welcome. 4,MOQ:5000pcs. NBR/FKM /EPDM O Ring Details:1. Material: Silicone, rubber, FKM ... , NBR, and NBR + PVC 2. Hardness: 30-90 Shore 3. Temperature range: -40 ...