Feeding stations can be configured to accomodate thistle, mixed seed or sunflower seeds by flipping side walls. Wide-mouth hopper design offers easy-fill - reduces or eliminates spillage. Easy clean feature: sidewalls remove to allow the user to quickly clean the feeder if desired. Unique adjustable depth perches allow users to tailor the feeder to attract the birds they want. Holds 4 pounds of seed. Dimensions are 10.41 X 6.73 X 7.68 UPC Code = 815562012107