DetailsEasily organize manipulatives, books, art supplies and more! Three or four tiers are tilted for easy access to the included 12 bins in four colors and two sizes. Easy-to-clean plastic rack features rounded safety edges and built-in handle cutouts for easy mobility. Support feet and steel reinforced crossbars provide added stability and strength. GreenGuard® certified. Three tier: 27½" high x 37½" wide x 14" deep Four tier: 33" high x 37½" wide x 14" deep.