Duncraft Metal Haven Birdfeeder holds black oil sunflower seeds and is ideal for attracting chickadees, nuthatches and more to your yard. Both the top and base are constructed of metal and has a metal cage surrounding the seed tube. May be hung or post-mounted. Feeder size is 17 inches in height and has a 15 inch long recycled resin seed tube. Seed tube is 7.5 inches in diameter and has a seed capacity of 1.5 pounds. Manufacturer has a lifetime guarantee.