This shelf features a 0"-3" adjustable clip size for secure bed rail attachment. It has a sturdy one-piece design made from recycled plastic, supporting up to 40 lbs. It includes a 15" x 10" surface, raised edges, USB slots, a phone/tablet holder, and an extension socket holder. Price drops from $29.99 to $18.99. Shipping is free for Prime members, or it adds $6.