Roof adjusts to welcome cardinals! Move the dome closer to the seed dish if you only want small birds. Transparent polycarbonate is UV stabilized to remain crystal clear. Fill with your favorite seed, mealworms, fruit or suet. Lifts off the suction cup bar for easy filling and cleaning. Holds 1/2 lb. Manufacturer’s Lifetime Guarantee. 8 x 6-1/4 x 8 inches.