Standard double wall fabrication. Inner chamber made of richly anodized aluminium or highly polished stainless steel sheet. Exterior fabricated out of thick mild steel sheet duly finished in powder coated paint. The gap between the walls is filled with special grade glass wool for heat insulation. Provided with 23 removable shelves. Nichrome wire heating elements provided on three sides attain quick and uniform heating in range of 50° C to 250° C ±1° C controlled by capillary type thermostat.