Troyer tunnels to modify on other gourds OR on houses.
"Conley #2" (also known as Clubhouse entrance) Starling Resistant Entrance Hole or round. Now feature BUILT IN wing entrapment guard molded into the tunnel!The SREH tunnels will give your purple martins added protection from European Starlings.
To use the collar drill a 3 inch hole into any type of martin house; wood, vinyl (plastic), aluminum with a flat surface. Screw or rivet into place (screws and rivets not included)
UV protected polyethylene lasts and lasts without degrading. Reinforcements under the porch and traction tread installed.
Instructions included.
Sold per each