viton gf grade rubber o ring 1.Quick shipment. 2.Standard size ... . 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.3. Hardness: 20 to 90 shore A or ... , JS, Metric and BS o rings are all available. Viton gf grade rubber o ring