This product we added our new design.<br> Stainless steel spring clips are added at the joints of each layer to make each layer more firm, stable and not shaking.<br> Each layer is easy to install, No tools required.<br> <br> <br> 13.75" L x 9.6" W x 3" D (each tray), total weight：4.85 pounds <br> This 4-Tier paper tray organizer has enough space to hold everything and ample room to stack up all your office stationery and paperwork without eating up available space. <br> Applicable to business, family, school, Office <br>