O-Ring Buna N AS568 Dash Number 339 Actual Width 0.210 In. Actual Inside Dia 3.225 In. Outside Dia 3.645 In. Cross Section Shape Round Durometer Rating Medium Hard Durometer 90 Shore A Nominal Width 3/16 In. Nominal Inside Dia 3-1/4 In. Nominal Outside Dia 3-5/8 In. Color Black Temp Range -25 Degrees to 250 Degrees F Meets/Exceeds SAE J200 ASTM D2000 Package Quantity 25