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, stipling, 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.