Accuspray 3M (16612) 1.4mm Atomizing Head Approved 3M replacement part Use with any 3M Accuspray Replaceable Nozzle Series Spray Gun  Current models include: HG18, HG14, HGP Transparent atomizing head offers visual confirmation gun is clean, or remove, discard and replace for the performance of a brand new spray gun on demand. Works with solvent-based and waterborne materials for 1.4mm applications (ie sealer or paint) 4 atomizing heads per kit