The Squirrel Buster Plus Bird Feeder with Cardinal Ring measures 22 x 6½ x 6½ inches, and includes 6 feeding stations, adjustable perches, and cardinal perch ring. The posi-grip ring system has been specifically designed to attract cardinals. As cardinals prefer gripping a thick textured perch and facing their food source directly the Squirrel Buster Plus Cardinal Ring perch system allows them to eat facing the seed while providing a secure and comfortable perch. The thick, adjustable-length perches with textured surfaces also provide a secure and comfortable grip for smaller birds such as Chickadees and Finches, or medium-sized birds including Grosbeaks and Woodpeckers.

The feeder is made from green powder-coated aluminum and the reservoir is made of UV-stabilized polycarbonate plastic which can hold up to 5.1 lbs of black sunflower, safflower, mixed seeds or dried mealworms. The adjustable spring mechanism closes seed ports to deter squirrels. It's designed with a unique seed ventilation system and is very easy to disassemble for cleaning. A 6-inch hanger is included, so be sure to provide an 18-inch/47-cm clearance on all sides.