4-Tier Storage Rack Rustic Brown and BlackFeatures Make It Different: Leave those boring furniture pieces behind and invite this industrial storage rack in. Crafted with a black steel pipe frame and rustic brown shelves, this 4 tier shelving unit will surely give your room a unique update Have It Your Way: With a customizable design, you can extend it infinitely with similar shelvesat least until it reaches the limits of your walls; also, the shelf height is adjustable so your plants or