Replacement Baffle Boards sold as a set of 2 pcs for many Wood Stoves and Fireplaces. It measures 13.5" long x 9.5" wide x 0.5" thick. Can be cut to fit with a utility knife. If the board is deteriorated or you notice large cracks forming it should be replaced. You should not burn your stove without a functional baffle board in place! Please check your manual for compatibility, many sizes are available, see more sizeshere.