Patented Seed Tube Ventilation System ™
Transparent seed tubes are like greenhouses, they trap solar energy. Traditional seed tube cover designs block the escape of heated air. The patented Seed Tube Ventilation System in the Squirrel Buster Mini, permits humidity and the warm air to escape through vents at the top of the feeder. The escaping air is replaced by fresh air entering through the seed ports. The seed remains fresher and attracts more birds.
Negative Grip Tube
The Negative Grip Tube prevents squirrels from grasping the wire hanger with their hind legs, hanging down alongside the feeder and defeating the closing mechanism.