360° Prism Design: Our total station prism is with 360° prism design has 6 individual prisms connected together. Constant and Quick Release Button: Total station prism has standard offset constant +23.1mm and quick release button connections. K9 Glass and Reflection: Total station prism is made of excellent K9 glass and possible to measure the reflection of the beam from any angle. ABS Material Housing: This total station prism is with ABS housing and around the top and bottom of the prism for protecting the glass. To prevent the prism rod from tipping over at the top. Versatile: Total station prism can be used to withstand jobsite environments, ideal for all machine work requiring measuring rods. Item Type: 360° Universal Total Station Prism Material: K9 Glass, ABS Constant: +23.1mm Effective Diameter: Approx. 25.4mm / 1in Application: Tunnel, metro, mine, highway and other testing, applicable for, for Leica GRZ4 and other measuring instruments. Use: Widely used in metro, railroads, tunnels, dams, steep slopes and many other industries. 1 x Storage Bag. Our listing price includes the value of goods, packaging cost, and export. Please check with your country’s. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.