Includes height adapter to Trimble Standard target height (135mm). Height adapter is used in conjunction with the telescoping rod. This 360 prism is compatible with all optical instruments and also supports all GNSS receivers for integrated surveying with a built-in 5/8th thread. A levelling bubble is also included, built into the 5/8th thread. Perpendicular markings on the prism cap simplify offset measurements. Prism Constant: +2 mm Integrated survey offset of 34 mm