Features POLISHED LENS: The optical glass lens is carefully polished, and the uniform and fine coating on the surface can ensure quality of lens ADAPTER SIZE: The single prism has a brass threaded adapter that can be attached to any 5/8in x 11 threaded rod or tripod WEAR RESISTANT AND STURDY: The prism is equipped with excellent plastic shell protects to ensure that the glass prism part is protected from wear and extend the life SCOPE OF APPLICATION: Single tilt prism can be used in tunnels, subways, mines, highways and other inspection, suitable for measuring instruments such as for trimble WIDE RANGE OF USES: Land surveying prism is widely used in subway, railway, tunnel, dam, steep slope and other industries Specification: Item Type: Single Tilt Prism Material: ABS Glass Diameter: Approx. 25.4mm / 1in Prism Constant: -17mm Application: Tunnel, subway, mine, highway and other detection, suitable for Trimble and other measuring instruments Application: Widely used in subway, railway, tunnel, dam, steep slope and other industries packing list: 1 x Single Tilt Prism Package List 1 x Single Tilt Prism