Top-TrackĀ® EZ Order Model, nominal 16 ft. system length x 4 ft. width, consists of (1) 11-1/2 ft. track set, (8) 86" posts, (1) 24" tie bar end kit, (16) 74" Top-TrackĀ® mobile posts, (4) 24" mobile kits (stainless steel casters, bumpers, rollers), (24) 24"D x 48"W shelves, Super Erecta Pro polymer/wire shelving, NSF