Heating element made of KANTHAL wire backed by cerawool insulation Viewing cap provided on door Temperature control unit consists of Energy regulator & pyrometer with silver thermal fuse, Maximum temperature 1000 deg. C, working temperature 940 deg. C Rating 1.8 KW to 4.0 KW depending upon size Digital controller cum indicator with safety alarm (Optional) 220/230 volts A.C. 50 Hz.