JCs Wildlife Diner 9 Window Bird Feeder Holds 3 Cups Blue Recycled Poly Lumber JUST MOUNT AND ENJOY: Enjoy watching wild birds up close--right at your window. WILL NOT RUST: Stainless steel screws attached to the suction cups will not rust GUARANTEED: Will Never Split, Crack or Fade DURABLE: Suction cups are the best you can buy - these are not cheap and flimsy imports. 4 suction cups will hold up your feeder unaffected by weather and temperature (2 on top and 2 on bottom) BIRDS THAT USE THIS FEEDER: Cardinals, Bluebirds, Downy Woodpeckers, Chickadees, Finches, Goldfinches, Nuthatches, Redpolls, Song Sparrows, Titmice and Siskins