These Clever Clean Tube Feeders feature Droll Yankees' Onyx bases and tubes. Easy to fill and even easier to clean! Wire cage protects your feeder against squirrels, grackles, starlings, and other big birds. Cage comes with hardware to attach to feeder. Slotted top allows hanging cable to slide through. Ideal for: cardinals, chickadees, goldfinches, house finches, nuthatches, purple finches, sparrows, and titmice.