AIR COMPRESSOR IS A MUST REQUIREMENT TO USE THIS PRODUCT. Standard Nozzle: 1.2 mm, Air Inlet: 1/4". Cup/Bucket Capacity: 700 ML, Operating Pressure: 30-50 psi Air Oap, Pattern Control, Trigger Control, Fluid Control Low air pressure saves Oil & Diesel and protects the environment, good design of construction. Alternative set up available for dealing with all today's modern two pack primers, fillers and top coats, Nozzle and needle in stainless steel to allow using with Diesel & Oil. Mainly used for cleaning dirt, grease and oil from engines and machinery, also be used for blowing dust, painting and other suitable works.