Sterling Seal OR90BLKBUN208X25 208 BUNA/NBR O-Ring, Nitrile, 90 Durometer Hardness (Pack of 25) Sterling Seal & Supply Buna nitrile O-Rings are Recommended for Use with crude oil, gasoline, propane, petroleum oils and water Sterling Seal & Supply Buna O-Rings have high extrusion resistance making them suitable for very high pressure static applications 90 durometer nitrile O-Rings resist wear, feature good mechanical properties in comparison to other elastomers and are built to withstand fuel, oil and other fluids Operating temperature: -40 to +250F 5/8ID nominal x 7/8OD nominal x 1/8CS nominal