Made of the highest quality tungsten carbide, tips have a micro-ground finish for extra long life and consistent size and spray pattern. Can be reversed for quick and easy cleaning. Includes metal and O-ring seal for Rev-Guard. Metal seal, no leaks, sprays all coatings. Interchangeable with Graco Rac IV Guard. No. 560-311: .311 orifice, 6'' to 8'' fan width, for use with stains and sealers No. 560-313: .313 oriface, 6'' to 8'' fan width, for use with lacquer and varnishes No. 560-515: .515 orifice, 10'' to 12'' fan width, for use with enamel and latex paints No. 560-517: .517 orifice, 10'' to 12'' fan width, for use with oil-base and latex paints No. 560-519: .519 orifice, 10'' to 12'' fan width, for use with heavier latex and oil-base paints