Nature's Way Bird Products DT17-P Deluxe Twist and Clean Thistle Feeder, 17-Inch, Pewter Twist & Clean technology - All parts are dishwasher safe for easy cleaning Wider tube enables easier filling with less spilling and 50% more feeding ports Six sides allow for viewing up to 50% more birds; Feeding holes located above and below perches allow birds to feed right-side up and upside down Rust free aluminum tops, ports, perches, base and hanger can't be chewed by squirrels Use thistle or nyjer seed to attract finches and siskins