Super Stop A Squirrel Feed The Birds And Not The Squirrels Hunter Green Large plexiglass window allows birds to see the seed. Squirrel's weight instantly causes perch bar to drop down sealing off seed. You can see how much the birds are eating and you can easily see when to refill the feeder. Tension adjusts easily to 4 different settings to restrict larger birds. It is made of heavy duty, rust resistant galvanized steel so it doesn't absorb bacteria and mold. Hold up to 11 lbs. of Seed Heavy Duty Steel hanger Included Tree, Post, or Wall Mount Powder Coat Finish In Stock-Ships Fast HS3201S 73928832015