3,000 psi at 4.0 gpm, 9 hp at 3,400 rpm, 1-inch hollow shaft, horizontal mount direct-drive, 6.35 mm keyway, 3/4-inch standard garden hose inlet, 3/8-inch quick-connect outlet, 50°C (122°F) max. Replacement pump kit with near-universal compatibility for standard 1-inch shaft direct-drive gas engines from Honda, Annovi Reverberi, RIDGID, Blackmax, Generac, Husky, Excell, Troy-Bilt, Sears, Briggs & Stratton, Campbell Hausfeld and more. Forged brass and anodized aluminum construction with cooling fins; Durable 15 mm ceramic-coated solid stainless steel plungers; German-made packing seals. Detachable and pressure-adjustable internal bypass unloader valve with detergent injector and built-in water filter; Triplex plunger pump mechanism; Sight glass for oil inspection. Replacement for Mi-T-M HSP-3004-3MGH HSP-3004-3MGV HSP-3504-3MGH HSP-3504-3MGR Grainger/Zoro GH-3004-0EGH GH-3504-0EGH.