Features Made of excellent aluminum alloy material Rotating protective cover for easy exposure of pentagonal prism Handle design with slot for mounting plumb and center lens Wide application in various industries Comes with a leather sleeve for storage and protection Specification: 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. Package List:1 x Total Station Rotating Optical Prism1 x Leather Sleeve Package List 1 x Total Station Rotating Optical Prism 1 x Leather Sleeve