Fully welded Smith System Bookcases are built to last. They feature double-wall side panels for extra strength and toughness. Their slotted inside walls allow shelves to be adjusted in 1" increments with easy-to-use clips. Shelves are constructed of 20-gauge steel with ’C’ brakes for added strength. Available in three sizes in Black, Champagne or Platinum. 2-Shelf Bookcase w/ 1 adjustable shelf, 12.5"d x 34.5"w x 29"h. 4-Shelf Bookcase w/ 3 adjustable shelves, 12.5"d x 34.5"w x 47"h. 5-Shelf Bookcase w/ 4 adjustable shelves, 12.5"d x 34.5"w x 59"h.