This is an excellent medium sized hanging feeder that has a built in feed saving grill and trough lip. The feed saving grill helps prevent feed waste by reducing the back and forth head action that birds use to sweep the feed out of the feeder. It has an adjustable flow rate and works great with a hanging feeder cover or lid which will help prevent birds from roosting on the feeder. The cylinder has a capacity of up to 20 pounds depending on the type of feed being used. Adjustable flow rate. 20" H x 17" diameter. Trough 3" deep & 2 " wide.