The Apollo 7500 AtomiZer spray gun is designed for use with any make of HVLP turbine or air compressor. It is created with a unique Tri-Mode design that allows three different cup configurations: gravity feed (three different cup sizes), pressure feed (quart cup) and production feed (2-quart pot or larger). According to the company, durability and reliability are ensured with internal parts engineered from marine-grade stainless steel with no “O” rings. The unit also features color-coded air caps to make changing a complete range of tips and needles quick and easy.