Your kit includes 4 shelves, 1 drawer storage bin, 2 notions and accessory boxes and 3 thread storage boxes. Perfect for fat quarters; work with the bin on top of the cabinet. Two shelves attach firmly to the right extension unit. You get three, full capacity thread storage boxes and two notions boxes - each with two levels of compartments. Two shelves attach firmly to the left extension unit. Or... stack your storage right on the work surface; at time of order, you can add-on an additional set of 5 boxes as well as a set of 4 XL thread storage boxes for your 1,100 yard spools and mini cones. [+] Roll-over thumb-nails for larger view