The Grainger 16U510 is a heavy duty shelving unit made of steel with 5 shelves. It measures 36" W x 18" D x 72" H. The shelves are adjustable in 1" increments and can hold up to 800 lbs per shelf. The posts have foot plates for stability. Assembly required. This industrial shelving unit provides sturdy storage space perfect for warehouses, stockrooms, garages, and other commercial/industrial settings.