Double walled chamber, Inner made of 4 Nos., siliminiterefractory slabs and outer made of cold rolled mild steel sheets finished in powder coating. Insulation by ceramic fibre blankets to minimize the radiation heat loss. Double walled insulated door mounted on heavy duty hinges is provided with effective locking arrangements. Heating elements will be kanthalA1 coil placed at the outside of the muffle.. Temperature is maintained and controlled by a digital temperature controller working in conjunction with thermocouple placed in the hot zone. Supplied complete with control panel.