Features GREAT REFLECTION: This topographic prism is designed for excellent reflection, which greatly improves the images and accuracy of measurements. OPTICAL GLASS: This prism uses optical glass, which improves the ability of reflection, with full texture, clear and bright, which makes the measurement more accurate. WIDE APPLICATION: The total station prism can be used in tunnels, roads, bridges, dams, buildings or some other places or fixed objects to measure distortion and displacement. LONG LASTING - The prism of the total station has been manufactured with good workmanship, which is sturdy and firm, not easy to damage, which ensures long-lasting use. EASY INSTALLATION: Comes with compact size and light weight, the prism reflector is very convenient to install in minutes. 1. GREAT REFLECTION: This topographic prism is designed for excellent reflection, which greatly improves the images and measurement accuracy. 2. OPTICAL GLASS: This prism uses optical glass, which improves the ability of reflection, with full texture, clear and bright, which makes the measurement more accurate. 3. WIDE APPLICATION: The total station prism can be used for tunnels, roads, bridges, dams, buildings or some other places or fixed objects to measure distortion and displacement. 4. LONG LASTING - The prism of the total station has been crafted with good workmanship, which is sturdy and firm, not easy to damage, which ensures long-lasting use. 5. EASY INSTALLATION: Comes with compact size and light weight, the prism reflector is very convenient to install in minutes. Specification: Item Type: Corner Cube Prism Material: Optical glass. Aperture: 0.2-1 Irregular opening: 0.1~0.3 Finish: 60/40 Full angle: 3-8 seconds Packing list: 1 x Corner Cube Prism Package List 1 x Corner Cube Prism