Adjustable Collar That Adjusts So Each Silo Can Serve Either Seed Or Water. Opposing Silos That Hold Both Seed And Water. Holds 1.15 Pounds Of Seed And 22 Ounces Of Water. Dimensions: 6.5 Wide, 6.5 Long And 14.25 High. Search_Phrases: Bird Feeders,Bird,Wild Bird,Feeder,Hummingbird,Woodstream Wildbird,Woodstream Wild Bird Garden Sip And Seed Feeder