This wire cart is constructed of Super Erecta™ for added durability. The unique corner release system and double-grooved SiteSelect™ post permit quick shelf adjustments in 1" increments. The wire cart has four 18-gauge shelves that are finished in a chrome-plating. Also included are 3 1/2" donut bumpers to protect the walls. Each wire cart has the ability to hold 300 lbs per shelf as well.