The 350 is an external mix airbrush. Air and paint mix outside the airbrush, creating a larger, coarser “dot" pattern and providing a heavier spray volume. The 350 is superb for base coating, stenciling, stippling, touch up projects, etc. An excellent choice for beginning students, hobbyists, ceramists, and automotive painters. This model sprays high viscosity materials such as ceramic glazes and stains, and hobby enamels with ease. It is also effectively used with properly reduced acrylics, inks, dyes, watercolors, acrylic, lacquers, enamels, Air-Opaque, Air-Tex, SpectraTex and MODELflex airbrush colors. The Model 350-4 Set contains medium airbrush with attachable jar, braided air hose with varying air source fitting, additional jar and cover, 1/4 ounce (7 milliliter) color cup, fine and heavy nozzles and fluid assemblies, wrench for needle assembly and instruction manual. Nozzles/needles are made of precision manufactured metals fine (F) - 1/8-inch (3 millimeter) to 2 inch (51 millimeter) spray pattern / medium (M) - 1/4 inch (6 millimeter) to 2 inch (63 millimeter) spray pattern / heavy (H) - 1/2 inch (12 millimeter) to 3 inch (76 millimeter) spray pattern. Proudly made in the USA. Fine and Heavy nozzles and fluid assemblies, wrench for needle assembly and instruction manual.