Feature: 1. ABS Protective Case: This prism comes with a soft protective case that ensures its glass prism portion from wear and prolongs its lifespan. 2. Optical Glass: Our optical glass lenses have been carefully polished, and the uniform and fine coating on the surface can ensure the lenses well. 3. Land Surveying Instrument: This all metal component can be used with a total station for land surveying and has a wide variety of uses. 4. Accurate and Durable: This prismatic head ensures precise positioning and high durability for a long service life. 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: Single Tilt Prism Material: K9 glass, ABS Effective Diameter: Approx. 64mm 2.5in Constant: 0mm30mm Scope of Application: Tunnel, subway, mine, highway and other testing, applicable for Trimble, for Sokkia and other measuring instruments. Use: Widely used in many industries such as subway, railroad, tunnel, dam, steep slope, etc.. Package List: 1 x Single Tilt Prism1 x Cover1 x Storage BagABS Protective Case: This prism comes with a soft protective case that ensures its glass prism portion from wear and prolongs its lifespan. Optical Glass: Our optical glass lenses have been carefully polished, and the uniform and fine coating on the surface can ensure the lenses well. Land Surveying Instrument: This all metal component can be used with a total station for land surveying and has a wide variety of uses. Accurate and Durable: This prismatic head ensures precise positioning and high durability for a long service life. Scope of Application: The prism head is suitable for the inspection of tunnels, subways, mines, highways and other measuring instruments for railroads and dams.