ProForm Vacuum Former, 110 Volt, Single Chambered, Aluminum Construction, 5 Year Warranty, Made in the USA. Symmetrical heating element provides uniform heat distribution and rotates 180 degree for access. Hexagonal post keeps sliding frame from twisting. Space-saving size - only 13 1/2" tall. Produces dozens of useful thermoplastic appliances such as mouth-guards, niteguards, TMJ splints, bleaching trays, temporary crown and bridge forms, retainers and more.