Replaceable atomizing heads for use with the 3M™ Accuspray™ Spray Gun model HG18 and HG09. The Accuspray™ System works perfectly with the 3M™ PPS(tm) Paint Protection System. An innovative system for mixing and spraying both solvent based and waterborne materials Description Head for Accuspray™ Gun Models HG18 and HG09. Size 1.8 mm Box 4