All 18 inches D x 24 inches W shelves have a 1 4 inches safety retaining lip and a raised texture surface.3 outlet UL listed electrical assembly with a 15 ft. cord, cord management wrap, and three cable management clips.Electrical attachment is recessed to insure easy passage through doorways.Four 4 inches silent roll, full swivel ball, bearing casters, two with locks, max. weight rated at 125 Lbs. each.Three shelf models will hold 200 Lbs., of evenly distributed weight.Shelves and legs are made from recyclable material. Type: Storage Accessories Color: Multi-Color