Metro Wire Security Module Kits Convert a standard 24" wide unit into a security module with this convenient kit. Used to enclose one or more areas of a unit. Fits between shelves spaced 20" apart on any Super Erecta Shelving unit. Adapts to 24" wide shelves in 30", 48" and 60" lengths. Consists of side panels, back panels and door. Convenient Door has hasps for two padlocks and when open, slides under the upper shelf and out of the way. Metro Wire Security Module Kit, Metro Security Shelving.  Posts and shelves sold separately.