Capacity - Weight 20 lbs per cube * Assemble as a 5-cube set or 4-cube set with extra grids used as shelves * Welded open wire construction reduces dust accumulation. . * Each set includes twenty 14" square interlocking grids, 22 plastic corner connectors and 16 clips. * 20 lb. Weight capacity per cube * Versatile design allows assembly as a 5-cube set or 4-cube set * Extra grids used as shelves * Welded open wire construction * Twenty 14" square interlocking grids, 22 plastic corner connectors and 16 clips. * 20 lb. weight capacity per cube.