Economical, sturdy, and strong with the ValueMate174; Bookcases you can8217;t go wrong! The shelf and exterior of the bookcase are constructed of steel and the back is made of solid fiberboard. Attractive, plastic snap-in radius corners make assembly easy and add to the overall strength of these units.. Generous 12" deep shelves accommodate 3-ring binders and large publications. Tools Required: Yes Material Thickness: 24 ga. Paint , Finish: Powder Coat Shelf Adjustablity: 1" increments Shelf Quantity: 5 Capacity - Shelf: 70 lbs. (evenly distributed) Material(s): Steel Recycled: At least 50% Assembly Required: Yes Color: Black Finished Product Dimensions: 31 3,4"w x 13 1,2"d x 67"h Finished Product Weight: 44 lbs.