Top-TrackĀ® EZ Order Model, nominal 10 ft. system length x 4 ft. width, consists of (1) 6 ft. track set, (8) 86" posts, (1) 21" tie bar end kit, (8) 74" Top-TrackĀ® mobile posts, (2) 18" mobile kits (casters, bumpers, rollers), (8) 18"D x 48"W shelves, (8) 21"D x 48"W shelves, chrome wire shelving, NSF