Ceramic Catalytic Combustor for Vermont Castings Wood Stoves Made in the USA by Condar, the Combustor Experts. For Vermont Castings models Defiant, Encore, and Large Winter Warm Insert. Measures 13 long X 2.5 wide X 2 thick. Made of high-quality materials; approved by the Environmental Protection Agency. 5-year pro-rated warranty (Claims are handled quickly by Condars tech service department 8am-5pm Eastern Time). IMPORTANT: This combustor is not compatible with the Defiant / Encore Two-in-One Flexburn stove.