Features:1. They are 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. 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.4. 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.Specifications:Color: BlackDurometer: 70AMaterial: Nitrile Butadiene RubberInner Diameter: 8.5mm / 0.33-inchOutside Diameter: 11.5mm / 0.45-inchCross-Section Diameter: 1.5mm / 0.06-inchPackage Contents: 10 x O-Ring Gaskets