Spring Pet Bird Galley Window Feeder - Clear Acrylic w/ Mirror Back - Attaches to Window w/ Suction Cups for Close-up Birdwatching, 2 Tubes for Different Seeds to Attract a Variety of Songbirds - Fun for Kids and Pets-Great for Homes,Offices,Apartments,Schools & Dorms Clear Acrylic Bird Feeder attaches to window with 4 suction cups for close-up bird watching Fill the two tube towers with different seeds to attract a variety of birds. Each tower holds 2 cups of bird seed so you can fill the feeder less often. Feeder is 6 1/2 inches tall and 11 inches wide. Has 2 screw on suction cups at the top and 2 double-sided suction cups to place at the bottom for extra holding power. One-Way Mirror Back that is attached to the back of the feeder prevents birds from seeing you and getting scared away Easy Set to set up and clean. Requires a Phillips head screwdriver to attach the top suction cups