The Aspects' Big Tube Feeder features a large 3 1/2 quart capacity with 6 feeding ports. This feeder also features a Quick-Clean removable base for easy cleaning and the seed tray removes with the base. The Aspects' Big Tube Feeders feature a Cardinal Perch. Based on years of collected ornithological data and thoroughly field tested, the Cardinal Perch offers birds of all sizes the optimum perching options in which to feed. Featuring a generous perching area and a wider feeding opening, the Cardinal Perch encourages a wider variety of birds to feed for longer periods.