Easy pull trigger max PSI 4500 inlet: 3/8" F max gallonper Min (GPM): 8 max temp 320° f designed with an easy pull trigger, these guns can be operated without high levels of fatigue or discomfort normally found in high pressure guns. Specifications: Max GPM- 8 Max PSI- 4500 Inlet- 3/8" F outlet- 1/4" F Max Temp- 320° F