UV stabilized polycarbonate tube; stainless steel wire; spring clamp; sheltering dome 15 long 8 diameter capacity 1 pounds. Lets song birds in, keep pesky squirrels out. Sunflower domed cage feeder. Restricts squirrels and larger birds. Wire bottom prevents debris build-up and there is not a collection area for attracting squirrels. The feeder can be hung or pole mounted.Size is 15 Inch. Dimensions are 18.25 X 15.75 X 15.75 UPC Code = 021964200619