Pearl Mantels, Inc. Pearl 159-48 Princeton Fireplace Mantel Surround, 48-Inch, Unfinished Full arched mantel surround Asian hardwoods and veneers unfinished paint and stain grade Inside dimensions of mantel opening 48 inches wide by 42 inches high 1 1/2" projection behind the mantel allows for easy installation over your non-combustible material such as marble or slate and scribe molding set included to finish the look and hide any gaps Ships in three pieces; Simple nuts and bolts assembly and mitered hanger board set up included for easy installation Look for the pearl inlay that graces the right hand side of the shelf as proof that you have received an authentic Pearl Mantel