This premium air pressure wax injector operates with compressed air. Designed and engineered with high quality standards and specifications. The wax pot is made of ?" high grade aluminum extrusion, CNC machined to a clean smooth surface (not cast aluminum). An electronic temperature thermostat maintains the set temperature constant within a ? 1?F. This controls the erratic temperature swings of 15? - 25? found on many other wax injectors. Has a built-in dial thermometer threaded into the pot at the wax nozzle level for a truer reading of the wax being injected. The nozzle is a precision built (CNC machined) drip proof nozzle to ensure smooth repetitive action. The cover of the pot has 3 locking knobs to secure and ensure a tight seal, with even and equal pressure distribution and a pressure regulator with a (0-15 PSI) gauge. A wax nozzle test handle is included. Made in USA.