The Audubon Going Green Suet Bottom Feeder features a unique design that allows only small birds to feed. The suet feeder features a wire-mesh bottom that helps small birds cling while prohibiting larger birds from stealing the feed. A recycled-plastic construction supports environmental awareness and resists UV rays for long-lasting attractiveness. Measures 9-inch by 9-1/2-inch by 4-inch high. This feeder won't absorb water and consequently will not harbor mold.