... o ring 1.Quick shipment. 2.Standard size in stock. 3.Most competitive price. 4.UV Resistance. Details about viton gf grade rubber o ring ... :1. Materials: comply to ROHS, Viton, or NBR, Silicone (VMQ), EPDM, etc.2. Temperature: -30~200°C ... thousands of current molds for all kinds of o ring, AS568, JS, Metric and BS o rings are all available. Viton gf grade ...