Open Construction - Clear View Of Birds On The Feeder. Diameter 7 , .5 Pound Capacity. Uv Stabilized Polycarbonate - Won T Yellow With Age. 3 High Quality Suction Cups. Made In The Usa And Covered By The Droll Yankees Lifetime Warranty. Search_Phrases: Bird Feeders,Bird,Wild Bird,Feeder,Hummingbird,Droll Yankees Inc,Droll Observer Window Bird Feeder Type: Feeders