AY-BF-555/666//888/8812/101012/121216-120 series box furnace uses 1200C the resistance wires as its heating element. Hearth is built with Ai2O3 fiber materials. Temperature of this furnace is controlled by high precise SCR power controller with +/-1 °C accuracy and 51 programmable segments up to 1200°C This furnace is built with double layer steel casing and air cooling, two cooling fans inside the case keep the temperature lower.. This tube furnace is an ideal tool for sintering all types of materials/chemical. Great for labs or college scientific research use.