Closed Shelving Units are ideal for industrial and commercial storage and organization. Closed shelving provides extra protection from dirt & dust, creates separation between areas and prevents product from falling off sides or back of unit. Units are available in 18 gauge, 4 heights and 15 shelf sizes. Each add-on unit includes one beaded post, 2 offset posts, one back panel, one side panel and selected number of shelves. Easy and quick assembly. Available in Gray.