The Studio Designs Premier Metal Art Tray are constructed of durable, powder-coated steel with a 7/8”U-shaped opening that conforms to Studio Designs tables or any other tabletops between ¾” – 5/8” thick. An oscillating mesh cup is featured with the organizer as well as deep compartment for storing a variety of art supplies. Mount the Premier Metal Art Tray to either the left or right side of your art tables. Also included is the removable Flexible Foam Organizer Tray that keeps pencils, brushes, and markers safe and organized as well as a cell phone slot to keep your phones clean and close to you.