Description: This universal narrow section hydraulic seal is made of black nitrile rubber, has a durometer of 90. For use across a wide temperature range from -22 degrees F (-30 degrees C) to 212 degrees F (100 degrees C). For hydraulic and reciprocating environment. Specifications:Inner Diameter: 40mm / 1.58-inchOuter Diameter: 55mm / 2.17-inchHeight: 9mm / 0.39-inchWorking Pressure: <16MPAWorking Temperature Range: -22 degrees F (-30 degrees C) to 212 degrees F (100 degrees C)