PISTON CROWN SEAL, SEAL TYPE CROWN, SEAL MATERIAL URETHANE, FOR BORE DIA. 1 5/8 IN, SEAL DUROMETER 95 SHORE A, SHELL DUROMETER 95 SHORE A, TEMP. RANGE -35 DEGREES TO 220 DEGREES F, FOR GROOVE WIDTH 0.185 IN, FOR PISTON GROOVE DIA. 1.379 IN, MAX. SPEED 3.0 FPS, MAX. PRESSURE 5,000 PSI, INSIDE DIA. 1 3/8 IN, OUTSIDE DIA. 1 5/8 IN, WIDTH 1/8 IN, HEIGHT 1/8 IN, COLOR BLACK