Portal Protector

Sturdy, rust-free brass ring that fits over the hole in bird houses to prevent gnawing and entry by gray, fox or flying squirrels.  Come complete with brass mounting screws.  Available in four sizes:

1 1/8" diameter hole - for nuthatches, chickadees, etc.

1 1/4" diameter hole - for wrens

1 12" diameter hole - for eastern bluebirds

1 9/16" diameter hole - for western and mountain bluebirds