Abs Connectors, Pp Plastic Panel, Metal Frame [Stable and Safe] Steel frames and strong PP plastic panels are connected by sturdy ABS connectors, enabling this cube storage organizer to hold up to 22 lb per cube. Anti-tip kit provides added safety [Customizable Shapes] Designed with an interlocking structure, you can arrange these plastic cubes into different shapes to adapt to your space, like a ladder shape or a 2 x 3 shelving unit [Easy Assembly or Disassembly] Quickly put this cube storage organizer together with the included rubber mallet. Or, easily take it down to store it away or move it to other places when needed [Raised Feet Connectors] The feet connectors raise this cube storage organizer from the ground, making space between it and dirty floors in your bedroom or living room. In a closet, you can use the standard connectors instead to save space [Spacious and Tidier] 6 cubes measuring 11.8" x 11.8" x 11.8" offer a large capacity in a limited space and can also be used with 10.5"L x 10.5"W x 11"H storage boxes for more organization possibilities