This Duro Combo Book Truck features two double-sided slanted shelves on top and flat shelf on the bottom, with quiet glide heavy duty casters. Ships assembled, except for the casters. Constructed from “prime” steel which has a 25% to 35% post-consumer recycled content. Truck is over 95% recyclable at the end of the product life cycle. All steel Bretford book trucks are certified to GREENGUARD Children & Schools Indoor Air Quality standards.