SKU: BQSBF3G Patented spirals attract more birds and allow more birds to feed. Birds love to perch and will 'run the spiral' instead of flying to another perch. Spiral design allows cardinals, grosbeaks and other desirable large songbirds to feed. Lifetime warranty on workmanship and normal wear and tear. Aluminum and stainless steel parts. Squirrel-proof patented "locking lid." Easy to clean, easy to hang.