Features 1、K9 OPTICAL GLASS: The total station prism is made of excellent K9 optical glass, with careful polishing to ensure accurate and reliable measurement. 2、ALUMINUM ALLOY: This prism uses excellent aluminum alloy to wrap the lens, wear resistance and falling resistance, greatly extending its service life. 3、ROD SPECIFICATION: This small prism is equipped with a rod, with a diameter of 16mm and a length of 16cm, making it easy to install the prism on the device. 4、WIDE APPLICATION: Widely used for detection in subways, railways, tunnels, dams, steep slopes, mines, highways, etc., with a wide range of application. 5、25.4MM GLASS: This prism has a glass lens with a diameter of 25.4mm, with bright texture, providing measurement accuracy and work efficiency. Specification Item Type: Total Station Prism Material: K9 Glass, Aluminum Alloy Glass Diameter: Approx. 25.4mm / 1in Rod Diameter: Approx. 16mm / 0.63in Rod Length: Approx. 16cm / 6.3in Application: Widely used for detection of subways, railways, tunnels, dams, steep slopes, mines, highways, etc. Package List 1 x Prism 1 x Cover