Features: Aluminum alloy 5/8" 11 threaded extension rod delivers compatibility with GPSs RTK/GNSS antennas and stabilizers, ensuring precise height calibration for surveying accuracy. Builts with yet 25mm diameter aluminum alloy and double male/female 5/8" -11 threads, this rod offer universal mounting adaptability for tripods, robotic systems, and measurement devices. for surveyors, engineers, and geospatial professionals requiring antennas height adjustments in construction, mapping, or outdoor fieldwork environment. streamlines GNSS antennas setups on tripods or robotic stabilizers during topographic surveys, boundarys marking, or precisions agriculture operations with its toolless height calibration. Engineered for ruggeds performances, this extension rod enhances measurement workflows by combining corrosion resistant materials with ergonomic for repeatable accuracy in demanding conditions. Specifications: Materials: Aluminum alloy Length: 10cm/15cm/20cm/25cm/30cm/40cm/50cm(optional) Interfaces: 5/8"-11 external screws, 5/8"-11 internal threads Package Includes: 1PC 5/8" Aluminum Alloy Extension Rod note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.