Black Steel Stove Board Extension This black steel extension provides ideal floor protection for combustible surfaces. Perfectly designed to complement the AC02711 hearth pad, it effectively protects combustible surfaces from hot embers that may fall during loading. Insulated with 1/2" Micore® 300, offering an R-value of 1.03, this extension ensures maximum safety while meeting CSA B365 (Canada) and NFPA 211 (United States) standards. ▪ Dimensions: 46 3/4" D x 18" W ▪ Material: Steel insulated with Micore® 300 ▪ Finish: Black powder coat for increased durability and resistance ▪ Weight: 25 lb ▪ Certifications: CSA B365 (Canada) and NFPA 211 (United States) ▪ Patent: [D1007009](https://certifiedcopycenter.uspto.gov/) ▪ Made in Canada