420C Chrome features include horizontal cooling fins and a trapezoidal head design, a standard 3/8 stainless steel braided leader hose with inline check valve and insulated wiring for simple installation.VIAIR C model compressors are intended to fill air tanks. They are not equipped with an ON/OFF switch or pressure sensitive shutoff device of any kind. The use of a pressure switch and relay are recommended and required. All C model VIAIR compressors are equipped with a stainless steel braided leader hose and a check valve to keep the compressor from restarting under pressure which can create an amp draw spike and can cause motor damage. Most VIAIR compressors are equipped with a thermal overload protector that will shut down the unit when overheated. When cool, the compressor will automatically restart as normal.