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