Rubber Oil Ring 1. Quality certificate: ROHS. 2. Materials: NBR, NR, FPM...etc 3. Use for all machines,size:50-630 ... tensile strength,good tearing property,heat resistance,abrasion resistance,oil resistance,acid resistance,alkali resistance,and good fire resistance. ... resistance,antoxidation,no permeation,acid resistance,alkali resistance. Rubber Oil Ring1. Unit price: depends on the material and the ...