... . 3.Most competitive price. 4.ROHS approved. Details about o ring rubber: Materials Comply with ROHS, NBR, Silicone (VMQ), EPDM, Viton, etc ... optimization.8. OEM and ODM are highly welcomed, V ring, D ring, X ring are all available.Our advantages:1. Strong QC and ... have thousands of current molds for all kinds of o ring, AS568, JS, Metric and BS o rings are all available. o ring rubber