Spring Energized Seal Seal Material Graphite-Filled PTFE Inside Diameter 0.484 in Outside Diameter 3/4 in Overall Width 0.187 in For Bore Diameter 0.75 in For Groove Width 0.188 in For Piston Groove Diameter 0.5 in Application Oscillatory Systems Reciprocating Systems Color Black Cross Section Shape Square For Rod Diameter 1/2 in For Rod Groove Diameter 3/4 in Hardness 55 Shore D Heel Type Standard Maximum Pressure 3 000 psi Maximum Surface Speed 1 920 fpm