Specification Brand : uxcell BulletPoint1 : [Size] - 57mm Outside Diameter, 50mm Inner Diameter, 3.5mm Cross-Section Diameter BulletPoint2 : [Hardness] - 70A Durometer (Shore Hardness) for resistance to penetration BulletPoint3 : [Nitrile Rubber] - Standard Nitrile Butadiene Rubber with a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). The o rings has smooth surface, great oil and heat resistance, wear-resistant and good sealing performance BulletPoint4 : [Application] - These small rubber o rings are widely used for automotive, pressure washer, bathroom floor drains, filter, pump, water hose, plumbing pipe, engines, valves, air conditioning maintenance and much more BulletPoint5 : [NOTE] - Please confirm the required size and material before purchase, and put it in the right place ExternallyAssignedProductIdentifier : 9636870209284 ItemName : uxcell Nitrile Rubber O-Rings 57mm OD 50mm ID 3.5mm Width, Metric Nitrile Rubber Sealing Gasket for Automotive Machine Plumbing, Pack of 5 ItemPackageDimensions_Height : 12.5 centimeters ItemPackageDimensions_Length : 1.8 centimeters ItemPackageDimensions_Width : 9.6 centimeters ItemPackageQuantity : 20 ItemTypeKeyword : o-ring-seals Manufacturer : uxcell Material : Nitrile Butadiene Rubber ModelNumber : a18080300ux0604 NumberOfItems : 100 PartNumber : a18080300ux0604 ProductDescription : Description: 1.They are circular in shape, round in cross-section. For use across a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). 2.Nitrile Rubber or Nitrile has good mechanical properties when compared with other elastomers and high wear resistance. Good resistance to many petroleum oils, greases, hydraulic fluids, mineral oil and grease. 3.This O-ring is made of black nitrile rubber, has a durometer of 70A, and is designed for use in a wide variety of sealing applications. 4.O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in , , flanges, valves, and various cylinders. 5.Nitrile Rubber is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.