Feature: 1. [360 Degree] There are six individual prisms connected together, allowing the measurement beam to be reflected from any angle. 2. [High Accuracy] The coating on the prism makes the measurement more accurate, and the copper or silver coating enhances the reflectivity of the prism. 3. [Excellent Material] 360° prism is accurate inspection of optical glass, and the prism material is carefully polished by K9 excellent glass cutting, which makes the measurement more accurate and durable. 4. [Land Surveying Instrument] This all metal component can be used with a total station for land surveying and has a wide variety of uses. 5. [Scope of Application] The prism head is suitable for the inspection of tunnels, subways, mines, highways and other measuring instruments for railroads and dams. Specification: Item Type: 360 Degree Reflective Prism Material: K9, ABS Constant: +23.1mm Effective Diameter: Approx. 25.4mm / 1in Scope of Application: Tunnel, subway, mine, highway and other testing, applicable for Trimble and other measuring instruments. Use: Widely used in many industries such as subway, railroad, tunnel, dam, steep slope, etc.. Package List: 1 x 360 Degree Reflective Prism1 x Storage Bag