Alvin - Table and Desktop Storage Tray - Black - The Alvin Table and Desktop Storage Tray is a versatile storage system that keeps work surfaces clear and organized. This Storage Tray is made from sturdy molded ABS plastic, this tray has 14 compartments of various sizes and 27 slots for pencils, pens, and markers. These Storage Trays have Special compartments for scissors and items up to 15inches long such as rulers or brushes. Can be mounted to the left or right side of any table that accepts wood screws. Works best for tabletops between 5/8 inch and .75 inch thick. Requires 4 inches of open space under table for the attachment of brackets. The Alvin Table and Desktop Storage Tray also includes rubber feet for convenient desktop use. Overall dimensions 29 inch length x 7 inch width x 2.25 inch depth. Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.