Built-in full-width bookboxes; includes two 18-gauge welded steel bookboxes with integrated pencil retainer; 1-1/4" thick 45 lb. density particleboard core with high-pressure laminate finish and durable melamine backer sheet; 3/8" thick T-mold bumper vinyl edge with radius corners mechanically fastened to underside of worksurface; powder-coat paint finish on upper legs and bookbox; scuff-resistant chrome plating on 16-gauge steel lower legs; 1" adjustable leveling glides with sock-style glide caps. Product is made-to-order and non-returnable. Made in the USA. Warranties: limited lifetime on certain components; 12-year on worksurfaces, 5-year on totes and tote rails, 1-year on electrical/dry-erase components.