Feature 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.SpecificationItem Type: Total Station Large PrismMaterial: K9 Optical Glass, ABSEffective Diameter: Approx. 64mm / 2.5inConstant: 0mm/-30mmApplication: Tunnel, Mine, Highway And Other Inspection, Applicable For TrimbleAnd For Topcon And Other Measuring Instruments.Use: Widely Used In Railroad, Tunnel, Dam, Steep Slope And Many Other Industries. Package List1 x TotalStationLargePrism1 x Cover1 x Storage Bag