Item Type: Total Station Rotating Optical Prism Material: Optical Glass, Aluminum Alloy Application: Tunnel, Subway, Mine, Highway and Other Testing, Applicable to for Leica and Other Measuring Instruments Use: Widely used in subways, railroads, tunnels, dams, steep slopes and many other industries. 1,Excellent Aluminum Alloy Material: This total station rotating optical prism is made of excellent aluminum alloy material wrapped around the lens, which is wear resistant and drop resistant. 2,Rotating Protective Cover: This total station rotating optical prism features a rotating protective cover that can be rotated to easily expose the pentagonal prism and allows front view viewing through the center lens. 3,Handle Design: This total station rotating optical prism features a handle design with a slot in the handle for mounting a plumb for Bob line center lens for forward looking observation. 4,Wide Application: This total station rotating light prism is widely used in subway, railroad, tunnel, dam, steep slope and many other industries. 5,Leather Sleeve: This total station rotating light prism comes with a leather sleeve that can be used to store the prism when not in use to prevent it from being scratched. 1 x Total Station Rotating Optical Prism 1 x Leather Sleeve Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.