Feature 1Smart Reflection: Consisting of 6 independent prisms, this total station reflector enables 360 degree reflection from any angel, very reliable. 2Standard Designs: This standard reflective prism comes with +23.1mm offset, 25.4 effective diameter and quick release connection button. 3K9 Glass and ABS: Adopting premium K9 glass and ABS materials, the surveying prism with top and bottom metal casing is not likely to overturn. 4Wide Application: Widely applied to a variety of measuring instruments for the detection of tunnels, mines, railways, dams, highways and so on. 5Quick to Install: Light in weight and compact in size as well, the 360 prism is very convenient to install on total station in several minutes.SpecificationItem Type: 360 PrismMaterial: K9 glass, ABS. Constant: Approx. +23.1mm / 0.91inEffective Diameter: Approx. 25.4mm / 1inApplication: For the detection of tunnels, mines, highways, etc. Suitable for various measuring instruments.Application: For the detection of tunnels, mines, highways, etc. Suitable for various measuring instruments. It is widely used in various industries such as railway, tunnel, dam, steep slope, etc. Package List1 x 360 Prism1 x Storage Bag