Galvanized steel plate with tan finish.
Diameter of the opening: 1.125"
Can be placed over the opening of a chickadee, nuthatch or Downy Woodpecker nest box, so that squirrels and woodpeckers cannot enlarge the opening and exclude larger bird species.
Dimensions of plate: 2'' x 2''.
Will work for :
Will exclude :
Great Crested Flycatcher
Eastern and Western Bluebird