Balmer designed the interlocking panel system to fit inside existing Beam and Arched Overmantels. The unique part of this design allows the customer to stack overmantel legs and continue interlocking the panels until you have reached the desired height of your overmantel.With IPS Adjustable height Fast, easy installation Material Sealed from the factory and requires no futher finishing Supplied in 6 piecesComplete Overmantel Panel Insert Weight: 80 lbs Complete Overmantel Weight: 40 lbs Crated Weight: 160 lbs Number of Pieces: 6 Overmantel Header Projection: 4 1 2 Overmantel Header Weight: 20 lbs Overmantel Header Width: 74 Overmantel Leg Weight (Each): 10 lbs Overmantel Leg Width: 8 3 8 Overmantel Projection: 2 3 16 Overmantel Width: 69 7 16 Overmantel with Header Height: 52