When your job requires maximum productivity and versatility, turn to the DutyMax GH 300 HD sprayer to get the job done—fast! Equipped with more power and a long stroke, direct immersion pump, this hydraulic workhorse is built for the biggest, most demanding jobs and materials.Graco’s Standard Series of DutyMax HD gas hydraulic direct-immersion sprayers deliver everyday reliability and performance while easily handling the widest range of tip sizes, longer hose lengths more heavy duty materials such as plasters, elastomerics, fire retardants and liquid roofing solutions.