Upgrade your storage space with this Cube Accessory with 1 Shelf Insert from Brightroom™. Made of wood, this accessory insert is perfect to fit on a storage rack or organizer for extra space. Designed in a white hue, this rectangular insert complements a variety of decor schemes. Compatible with 13" cube organizers, add it to your existing shelving for extra display space. Brightroom™: See your space in a new light.