Storex's line of corrugated products are made of an improved cardboard with a plastic layer. This durable layer gives bright colors and wipes clean easily. It is also tear resistant so your new purchase will outlast the school year. All of Storex' s Corrugated products are compatible with dry erase markers. Assembly videos and instructions are included with every purchase.• Plastic coating for increased durability and brighter colors• Wipes clean with a cloth• Compatible with dry erase markers• Assembly videos and instructions are included with every item• Dimensions: 12.5" x 21" x 16.5"Special Shipping Information: This item ships separately from other items in your order. This item cannot ship to a P.O. Box. This item may be subject to additional processing days.