The F130 with Sentry Xpress 3-Key Controller is a Steel Chassis Kiln with Insulating FireBrick and a groove mounted side Elements. It measures 11″W x 13″H x 11″D inside. The F130 is rated to 1700° F. It fires on 120 Volts and needs no other heating source. Standard color: Blue. Rated to 2400 Watts.