The Paasche HG-08 Airbrush HVLP Gravity Feed Touch-Up Spray Gun comes with a 88 mm spray head The HVLP spray gun has a fully adjustable spray fan pattern It is great for those jobs that fall in between an airbrush and a large spray gun This gravity feed spray bottle is compatible with water or other solvent-based paints The air hookup of this spray gun is ¼” NPT