With a 5/8" screwthread this 1 foot (30 cm) pole segment is designed for mounting a GPS Pathfinder ProXH or ProXT receiver on a backpack or vehicle mount. It can also be used to mount a Zephyr or Hurricane antenna on a backpack or vehicle mount. This pole segment is compatible with the GPS Pathfinder Pro XRS, Pro XR or Power receivers, and can also be used with a pole mount groundplane to mount an external patch antenna for a GPS Pathfinder Pocket receiver or GeoExplorer series handheld. Add a 6 inch pole segment if additional height is needed.