Annovi Reverberi AR303 diaphragm pump male six spline tractor PTO shaft 30 lpm 40 bar (580 psi)Annovi Reverberi AR303 diaphragm pump Male six spline tractor PTO shaft BlueFlex long life diaphragms Performance: 30 lpm (7. 9 gpm) max flow 40 bar (580 psi) max pressure Features: 3 diaphragm pump design includes six spline male tractor PTO shaft 2. 4 hp power requirement hose tail fittings are included 25 mm (1 inch) suction hose tail 13 mm (1 2 inch) outlet hose tail 550 rpm max rated pump speed self priming ability can be run dry without damage