These tunnels come with the Conley 2 entrances and are made to be mounted onto wooden or aluminum houses. The tunnel offers additional safety by increasing the compartment depth to keep nestlings at a further distance from predators. To use the Troyer Collar drill a 3" hole into any type of martin…

These tunnels come with round entrances  to be mounted onto wooden houses. The tunnel offers additional safety by increasing the compartment depth to keep nestlings at a further distance from predators. Can be mounted with screws or nuts and bolts (not included). Existing house entrance…