This Versitle, high quality pump is ideal for Log Splitters or any other piece of equipment requiring high speed low pressure and low speed high pressure circuits. * Hi/Lo 2 stage pump: 16 and 6 GPM gear-sets combine for 22 GPM total. * Max Pressure 4000psi intermittent, 3000PSI continuous. * Max RPM: 4000 * Shaft size 5/8" * Inlet 1" NPT * Outlet 3/4" NPT * Requires about 11hp or more to run efficiently. * Looking at shaft side, pump spins clockwise