... 4.UV Resistance. Details about viton gf grade rubber o ring:1. Materials: comply to ROHS, Viton, or NBR, ... 6 R&D engineers, strict quality control and assurance system to assure high quality products. 6. Lead time: ... OEM and ODM are highly welcomed, V ring, D ring, X ring are all available.Our advantages:1. Strong QC ... thousands of current molds for all kinds of o ring, AS568, JS, Metric and BS o rings ...