Suttner soft wash gun ST-510 is designed for the high flow rates and low pressures typically required by soft wash applications. It can handle up to 18 GPM and 362 PSI. It is made with a reinforced fiberglass plastic body for resistance against aggressive chemicals. Plus, the other components are made with chemical-resistant materials for longevity. The ST-510 soft wash gun can also be used with hot water up to 122 degrees Fahrenheit.