This unique design squirrel feeder makes it easy for squirrels to get to the feed area but prevents birds from using it. You'll enjoy watching your furry visitors hang by their back legs and reach down into the jar to grab a treat. The 1/2 gallon mason jar screws into place making it easy to refill. The feeder is made from hand selected Western Red Cedar know for its resistance to rot and insects. It has been assembled using wood screws so that it is strong enough to last for many years of use and enjoyment. The large overhang on the roof guarantees to keep rain out of the jar. If you ever need another jar they are readily available at many retailer. Easily mounts to fence, tree, or side of building with provided screws.