Four-shelf laminate bookcase features a square-edge profile & hardboard back panel. All surfaces (except outside of back) are finished in abrasion-resistant, thermal-fused, Mahogany laminate over solid-core, high-density particleboard. Three of the 3/4" thick shelves are adjustable in 1-1/4" increments. The bottom shelf is fixed. Bookcase is designed for small office / home office applications. Cam-lock fasteners & wood dowels ensure pieces go together easily & precisely. Bookcase is equipped with four adjustable leveling glides & meets or exceeds ANSI / BIFMA & ISTA performance standards.