Rubber Oil Ring 1. Quality certificate: ROHS. 2. Materials: NBR, NR, FPM...etc 3. Use for all machines,size:50-630 O ... good heat resistance,antoxidation,no permeation,acid resistance,alkali resistance. Rubber Oil Ring1. Unit price: depends on the material and ... etc.4. Customers samples and drawings are accepted5. Available in various sized6. OEM service offered / ODM service offered7.Logo & Printing ...