Features High Precision:This 360° prism has a constant of +28.1mm, which indicates the offset or correction value to be applied during measurement. Its effective diameter is 25.4mm, which determines the size of the measurement area. These specifications make the prism suitable for a variety of applications that require precise measurement. Reflective Coating:This total station reflective prism has a reflective coating that ensures that a higher percentage of the measurement beam is captured and redirected to minimize loss and maximize accuracy. Sturdy and Durables:This 360-degree mini prism is made of high-quality K9 glass, which is known for its high light transmittance, which means it allows a high percentage of the measurement beam to pass through, resulting in clearer and more accurate measurements. Stable Performance:This 360° total station prism is designed with 6 independent prisms connected together, allowing the measurement beam to be reflected from any angle. This design feature provides flexibility and convenience during measurement because it allows reflection from all directions without repositioning the prism. Wide application: This 360-degree reflective prism has a wide range of applications and can be used in inspection scenarios such as tunnels, railways, dams, mines, highways, steep slopes, etc. to achieve efficient and reliable measurement. Specification: Item Type: 360° Prism Material: K9 Glass, ABS Constant: +28.1mm Deviation: 3 Arc Seconds Effective Diameter: Approx. 25.4mm / 1in Application: Tunnel, Subway, Mine, Highway and other Inspection, Applicable to for Sokkia, for Trimble and Other Measuring Instruments. Use: Widely used in subway, railroad, tunnel, dam, steep slope and many other industries. packing list: 1 x Total Station Prism 1 x Strap 1 x Carry Bag Package List 1 x Total Station Prism 1 x Strap 1 x Carry Bag