This curvilinear letter tray has raised ribs to make it easy to grasp documents as well as protective nonskid pads. The trays stack and cascade with risers (D1132). 10 ¾" W x 13 ¾" D x 1 7/8" H. Black. 25% post-consumer recycled plastic. D1131US $8.75, 6/US $46.50