Tube Furnace, Type 21100 Percentage Input Manual Control. 120V, 1250W. Maximum Temperature: 1100[degree]C. Chamber: 30.5Lcm. Overall: 40.6Wx30.5Hx37.1Dcm. Stainless steel and unitized controller and chamber. Accommodates interchangeable vestibules allowing tubes up to 5.1cm diameter. CSA certified. Barnstead, Electrothermal, Lab-Line, and Thermolyne are the highest quality laboratory products owned by Thermo Scientific.