General description Keep squirrels away from bird food with this ingenious bird feeder. It features a large hanging hook (16cm x 15cm) and an array of features designed to deter squirrels from accessing precious bird food. Technical specifications Dimensions of hanging hook: 16cm x 15cm Overhang of metal lid: 3.5cm all around Number of feeding ports: 3 Usage Squirrel resistant design 3 metal feeding ports Spring loaded perches that remove footing when weight is applied Overhanging baffles to obstruct squirrels Includes 3 inserts for niger seed compatibility