1.Material:NBR,HNBR,SIL,VITON... 2. Technique: injection molding 3. Inspection: 100%, NBR (nitrile rubber) sealsUsed in the petroleum series hydraulic oil, glycol Department of hydraulic oil, gasoline, water, silicone grease, silicone and other media. Is the most widely used, the lowest-cost rubber sealing material. Does not apply to polar solvents such as ketones, smelly itchy, nitro ...