Features 1、[Working Process] Our single tilt prism is used together with total station for land survey and has a wide range of uses. 2、[K9 Optical Glass] Our single tilt prism is made of excellent K9 optical glass and with excellent workmanship. 3、[Reflecting Ability Enhancing] The optical glass accurate detection enhances the reflection ability of this total station prism, good texture. 4、[Clear and Bright] Optical glass can make this total station prism detecting more clear and bright, more accurate measurement. 5、[Robust ABS Housing] This surveying single tilt prism is with robust ABS housing and ensure that the glass prism is protected from wear. Specification Item Type: Total Station Large Prism Material: K9 Optical Glass, ABS Effective Diameter: Approx. 64mm / 2.5in Constant: 0mm/-30mm Application: Tunnel, Mine, Highway And Other Inspection, Applicable For Trimble And For Topcon And Other Measuring Instruments. Use: Widely Used In Railroad, Tunnel, Dam, Steep Slope And Many Other Industries. Package List 1 x Total Station Large Prism 1 x Cover 1 x Storage Bag