The best squirrel (and large-bird) proof feeder on the market. Weighted perches close off feeding ports to squirrels, chipmunks and large birds. Adjustable spring allows user to change the sensitivity of the perches based on what they want to keep off (or not) of feeder. Our only "squirrel proof feeder" recommendation. Holds 3 quarts/3.5 pounds of seed. Lifetime warranty. Brome Bird Care.