18″ tube, onyx removable base feeder, 2.75″ diameter, 4 port sunflower/mixed seed bird feeder with removable base, easy open top: by pressing the button at the top of the feeder, you can now easily fill the feeder without taking it off of the hook or tree. lower the hanger when its not in use. tray is removable for the option of no tray. fully assembled.