Heavy duty, flat pack nest box suitable for the Ringtail Possum. (Ready to mount box pictured). Internal dimensions 400 (H) X 200 (W) X 200 (D) Vertical box with 85mm entrance hole. Tree mount is integrated into the box design, so can be readily screwed or wired to the tree. Two X coach screws provided. Recommended installation height above ground is 4 metres.