Features 1、FINE WORKMANSHIP: Optical glass accuracy detection, K9 premium glass cutting and careful polishing, measurement more accurate and durable. 2、LONG SERVICE LIFE: Premium oxidized plastic wrapped lenses are wear resistant and fall resistant, greatly improving its service life. 3、WATERPROOF PRISM: This total station right angle prism possesses excellent waterproof performance, withstanding different tunnels environments, use with confidence! 4、EASY TO CARRY: Small size and lightweight make the prism easy to carry for convenient use, suitable for different uses. 5、WIDE APPLICATION: Widely used in various industries such as subways, railways, tunnels, dams, steep slopes, etc. Specification Item Type: Total Station Right Angle Prism Material: Optical Glass, ABS Specification: Waterproof Type Constant: Approx. -25mm / -0.98in Effective Diameter: Approx. 25.4mm / 1in Scope of Application: Testing of tunnels, subways, mines, highways, etc. Suitable for Leica and other measuring instruments Application: Widely used in various industries such as subways, railways, tunnels, dams, steep slopes, etc. Package List 1 x Total Station Right Angle Prism