o ring color code 1.Quick shipment. 2.Standard size in stock. 3.Most ... competitive price. 4.ROHS approved. Details about o ring color code: Materials Comply with ROHS, NBR, Silicone (VMQ), EPDM, Viton, etc ... production cost optimization.8. OEM and ODM are highly welcomed, V ring, D ring, X ring are all available.Our advantages ... and BS o rings are all available. o ring color code