Steel Catalytic Combustor for Vermont Castings Intrepid & Small Winter Warm Insert Wood Stoves Made in the USA by Condar, the Combustor Experts. For Vermont Castings models Intrepid and Small Winter Warm Insert. Measures 6.6" long X 2.5" wide X 2" thick. Lower light-off temperature. Engage your draft bypass at 100 lower temperature than with ceramic honeycomb. Steel heats up faster than ceramic. Recovers more usable heat from wood smoke. Sharp steel edges cut ash as it goes up flue. Better air flow, no cleaning maintenance.