Make room and get organized at the same time with the DuraShelf heavy duty plastic shelving unit. The unit quickly and easily assembles in 2 minutes. The four shelves will hold up to 500 lbs (125 lbs of weight per shelf). The ventilated shelves allow enhanced air circulation and feature a back and side lip to help keep items on the shelf. The shelves are free standing, but feature holes to allow them to be mounted to a wall for additional stability. Constructed from heavy duty polypropylene copolymer plastic, these shelves are designed to withstand a wide range of temperatures and stand the test of time. Get your life in order with Overstock.com.