Are you having issues with starlings breaching your conley entrances? These 'Starling Stoppers have been found to increase the starling-resistance of Conley II entrances. Conley entrances are what you find on Troyer gourds.
If you are finding that starlings can enter your conley entrances these are highly recommended.
Hardware included.
Starling Stoppers must be removed in order to use troyer Tunnel Trap.
Comes in a set of 4 (four) to convert 4 conley entrances.