ClosetMaid 21MC-SS Modular Closet System Adjustable 4 Shoe Shelf Unit with Rails Features: Unit can be used as standalone storage or multiple units can be stacked Constructed of high quality laminate for lasting durability Compatible with additional ClosetMaid Modular Closet ...ClosetMaid 21MC-SS Modular Closet System Adjustable 4 Shoe Shelf Unit with Rails Features: Unit can be used as standalone storage or multiple units can be stacked Constructed of high quality laminate for lasting durability Compatible with additional ClosetMaid Modular Closet storage units and accessories Easy to install with all necessary mounting hardware included Specifications: Height: 40-5/16" Width: 21-3/8" Depth: 15-15/16" Number Of Shelves: 4 Product Weight: 56.3lbs.