Spring Energized Seal Seal Material PTFE Inside Diameter 0.237 in Outside Diameter 7/16 in Overall Width 0.125 in For Bore Diameter 0.44 in For Groove Width 0.149 in For Piston Groove Diameter 0.25 in Application Oscillatory Systems Reciprocating Systems Color White Cross Section Shape Square For Rod Diameter 1/4 in For Rod Groove Diameter 7/16 in Hardness 55 Shore D Heel Type Standard Maximum Pressure 3 000 psi Maximum Surface Speed 1 920 fpm Maximum Temperature 450 Degrees F