Includes 18 hollow injection-molded polypropylene panels that assemble to up to 6 cubes. Each cube: H 18.25" W 18.25" D 10". Each shelf can hold up to 55 lbs. Multiple kits can be combined to create a larger shelving system. This kit is only compatible with the original Cubitec model, released in 1998. Two cubes can be doubled in depth to accommodate larger items, or extended vertically or horizontally with the included plastic hardware. They easily anchor to the wall with common fasteners for configurations higher than 3 cubes.