XMV3G30D Pressure Washer Pump 3000PSI, 3.0GPM AR AR XMV3G30D-F24 Triplex plunger pump with AR20400 adjustable unloader & chemical injector Direct Drive with 4 bolt Gas Flange, 8 - 13.0 HP horizontal engines Max. Volume: 3.0 GPM Max. Discharge Pressure: 3,000 PSI Fits most horizontal engines with a 1(in) straight solid shaft with keyway