All stainless steel internal components create a durable long lasting trigger gun, especially suitable when using corrosive chemical. Comfort technology designed trigger system actually helps the operator keep the trigger open. Fatigue is reduced, allowing longer work periods. Stainless steel interanl components. Suitable for corrosive chemical usage. "Relax Action" trigger and comfort grip. Unitized valve for easy repair. 300 F. maximum temperature 5000 PSI 12 GPM Inlet 3/8" FNPT Outlet 1/4" FNPT