Double / Semi Triple / Triple walled, outside mild steel construction, inside chamber made of stainless steel of 304 grade, perforated adjustable shelves, air ventilation, temperature range 50-300 deg.c. / 50- 400 deg.c. digitally controlled with PT 100 Sensor, +/- 3 deg.c., heating elements tubular type, with air circulating fan with ¼ HP motor of standard make,  ceramic  fiber wool  insulation 100mm / 125mm door with heavy duty asbestos gasket, handle, on / off switch, indicating lamps, Work on 220 / 440 v AC.