Patented spirals attract more birds and allow more birds to feed. Nine seed ports on Spiral Nyjer Thistle Feeder versus six on most others - 50% more! Birds love to perch on the patented spiral. They love to "run the spiral" instead of flying to another perch. Lifetime warranty on workmanship and normal wear and tear. Aluminum and stainless steel parts. Available in green, copper, silver and yellow colors, and now black "Elegant" style. Squirrel-proof patented "locking lid." Just twist and lock those pesky varmints out. Totally squirrel-proof your feeder with the BirdQuest™ Twirl-a-Squirrel™ Electronic Bird Feeder Baffle. Easy to clean - "Twist & Clean" (patent pending) easy-clean bottom comes completely off for easy cleaning. No screws to mess with. Easy to hang - looped wire hanging cable included (150 lb. test) and attached. Holds cap so you don't have to wonder where you put it. Feeders come completely assembled in beautiful open view box. Take out of the box, hang in your yard, and watch how fast the birds are attracted to the patented "Spiral Perch."