The Tool Force 50 psi 2-in-1 HVLP spray gun provides a better than 75-percent transfer efficiency with less than 10-percent psi output pressure. This spray gun features a 1.4-millimeter stainless nozzle for lighter materials and 2-millimeter stainless nozzle for heavier materials. It offers high atomization with low nozzle air pressure. The tool has a 1/4-inch air inlet and requires a 2-to-3 HP air compressor.50 psi 2-in-1 HVLP spray gun offers high atomization with low nozzle air pressureBetter than 75% transfer efficiency with less than 10% psi output pressure1.4-millimeter stainless nozzle for lighter materials; 2-millimeter stainless nozzle for heavier materials1/4-inch air inletRequires a 2 to 3 HP compressor (not included)