Feature: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.Specification:Item Type: Total Station Rotating Optical PrismMaterial: Optical Glass, Aluminum AlloyApplication: Tunnel, Subway, Mine, Highway and Other Testing, Applicable to for Leica and Other Measuring InstrumentsUse: Widely used in subways, railroads, tunnels, dams, steep slopes and many other industries..Package List:1 x Total Station Rotating Optical Prism1 x Leather Sleeve