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: 11" x 3.3" x 12.6"