Made especially for Droll Yankees Clever Clean feeders, but also fits DY Ring Pull, DY Classic, DY New Generation, and some other brands. You don't have to remove the tray to remove the base of the Clever Clean feeder — just twist the tray to remove the Clever Clean feeder base. The wing nut under the tray is recessed allowing the tray and feeder to stand upright while being filled. The wing nut also includes a hook from which to hang another feeder. Includes drainage holes. UV-stabilized polycarbonate. Diameter: 10.5". (Tube feeder not included.) By Droll Yankees.