Pro-Form 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. When searching for Keystone Dental products, if you are not able to find the Keystone Dental product you are looking for. Let us know, we will contact Keystone Dental products and bring what you are looking for.