Nature's Way Bird Products WT17-P Wide 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; Threaded base accepts Nature's Way Seed Tray Rust free aluminum tops, ports, perches, base and hanger can't be chewed by squirrels thistle and nyjer will attract finch and siskins