Made of sturdy cast aluminum, this vessel is built to provide 20 PSI Pressure, while the acrylic resin is curing forming a dense crosslinked repair for the dentist and patient. Includes pressure gauge, safety valve, air valve to introduct air into the pot, auir hose (ready to connect to your compressor air source). Will also doublea s a subsititue curing pot, accommodating a 2-case bronze compress with the cover removed