Our Colorations® Mobile Art Rack makes preparing for classroom activities easy! It is deal for paintings or other art materials, manipulatives, puzzles or even food. Rack has 20 slots for trays, 15"L x 10-1/2"W trays (trays are not included). This mobile cart is made from sturdy 1" metal piping. Lightweight for easy mobility from room to room. It's 4 locking casters making it easy to disperse supplies easily, and lock to keep stationary. Sturdy metal powder coated frame is rust-free. Rack is sold without trays. Optional trays called ARTRAY (5 trays) by Colorations. Rack has 20 slots for trays, 15"L x 10-1/2"W trays (trays are not included).