-1400°c, 1500°c or 1600°c maximum operating temperature -carbolite gero 301 controller, with single ramp to set-point & process timer -3, 8, 15 or 35 litre chamber volumes -soft closing parallel action door (3 & 8 litre models only) -silicon carbide heating elements provide long life and are able to withstand the stresses of intermittent operation -rhf 3 & 8 litre have a cast alumina hearth; rhf 15 & 35 have silicon carbide hearth -low thermal mass insulation for high energy efficiency