Heavy steel construction with anti-racking design. The square fiberboard tubes are reinforced with aluminum molding. Each tube can hold 4-7 lbs. of rolled material. Reversible door for left or right opening. Door label and label grid included for easy identification of contents. Files are stackable for high-volume storage. Available in two tube sizes: 31/4" and 21/4". Shipped assembled. Tropic Sand finish.