"The Wagner Airless Spray Gun is an Industrial Quality Stainless Steel Airless Gun with Filter, Swivel and Base. It is ergonomic and is designed to have a low holding force and a pistol grip for the trigger to allow the user to work without fatigue. All parts that coming into contact with the material are made of stainless steel. This makes it possible to process water-based paints and solvent based materials. With insulated handle ideal for heated hose use. Stainless steel is best suited to products with high or low PH levels below 4 or greater than 8. Max Pressure Rating: 3900 psi"