Box beam shelf design and double-sided compression clips support loads up to 350 lbs. per shelf (based on a 36"W x 12"D shelf evenly loaded). Shelves can be easily repositioned in one-inch increments. Post Kit includes four 75" high posts (must be ordered with each Shelf Pack). Durable Dark Gray finish. Assembly required. 6 shelves per carton. Use with Safco 5271 Commercial Steel Shelving Post Kit.