The outer chamber is made of mild steel, powder coated to protect from rust. Inner chamber is made of stainless steel. A glass window door is fitted with transparent glass and the outer & inner chamber is insulated by good quality glass wool to protect heat loss. Temperature 5° c above ambient to 150°c. Accuracy ± 2°C approx. Heat distribution system inside the chamber to maintain temperature uniformity. Heating elements are connected in three sides of the chamber. Operating voltage 220V AC, 50 Hz.