Feature:1. COMPACT AND PORTABLE: This total station spherical prism head is small and compact, easy to carry, convenient to use, and seamless with the measuring instrument2. LONG LASTING MATERIALS: The prism is made of K9 glass and aluminum alloy materials, clear, efficient, long lasting, and will hold up in the harshest conditions for years to come3. APPLICABLE SCENARIO: Total station ball prism come with strong magnet, can be used for metal bridges, rails and other places that can be attracted by magnets4. EASY TO FIX: The total station spherical prism head has a throughhole in its magnetic base, so that can also be fixed to concrete and wood walls5. HD AND ACCURATE: Spherical magnetic bottom prism, bottom magnet, HD prism, bring high accuracy measurement, suitable for all kinds of total station ranging, suitable for various measuring occasionSpecification:Item Type: Total Station Reflective SphereModel: BP001AMaterial: Aluminum alloy and k9 glassPrism can be adjusted in a universal directionPrism Diameter: Approx. 17.8mm / 0.7inBall Diameter: Approx. 30mm / 1.18inMagnetic Base Diameter: Approx. 35mm / 1.38inUse: Used for total station, high accuracy measurement, such as high speed rail, shipbuilding, railway, site measurement.Package List:1 x Total Station Reflective Sphere1 x Storage Bag