Gardener's Supply Company Squirrel Resistant Globe Cage Mixed Seed Bird Feeder USE- Sturdy and squirrel-resistant tube feeder creates a safe place for small birds to feed MEASUREMENTS- Openings are approx. 1-1/2" W x 2", 11-3/4" diameter MATERIALS- Powder-coated steel, polycarbonate, plastic GARDENER'S SUPPLY EXCLUSIVE DETAILS- Holds 3 cups of any type of seed, even small seed like millet, and has four built-in feeding ports