The Grainger General Purpose Boltless Metal Shelving is a freestanding shelving unit made of steel with 4 adjustable shelves. Each shelf can hold up to 770 lbs and the total load capacity is 3080 lbs. The shelves are adjustable in 1 inch increments on the uprights using sleeve nuts to lock them in place. The shelves are 36"D x 48"W. The unit is available in heights of 60", 72", 84", and 96". Assembly required using provided hardware and instructions. Ideal for warehouses, retail stores, garages and other storage needs.