Very well made wax injectors. Two Large knobs on cover for easy adding or removing wax Chamber made of heavy duty cast aluminium Outside made with high resistant stainless steel Uses an external air source ( can use silent compressor see related products) No leakage with a nozzle double sealed Air regulator and pressure gauge 0-30PSI Heavy Duty air pressure regulator with easy to read dial Ceramic-mica Heating element Adjustable bimetallic Thermostat Built-in side drain for clean up Wax Capacity: 2-3/4 Quarts Maximum Temperature: 250°F/ 120°C Dimensions: 8"Width X 14"Height Electric: 110V/ 60Hz / 1PH Weight: 27lbs Made in USA