2x4basics 07419 ShelfLinks Custom Storage System, Black, 6-Pack Functional and custom shelving of any length, height and configuration Assembly with only a screwdriver; all hardware is included ShelfLinks support spans up to 8 feet (2.4m) and 1000 pounds (400kg) per shelf 6 ShelfLinks included; each ShelfLink is 15.5 long by 5 inches wide by 3 inches tall Lifetime warranty