Item Type: Prism_x000D_ Material: ABS, K9, Brass_x000D_ Effective Diameter: Approx. 65mm/2.6in_x000D_ Prism Constant: 0mm (for Leica Total Station, the Prism Constant is 0mm)_x000D_ Connector Type Diameter: Approx. 12mm/0.5in Hole_x000D_ Scope of Application: Suitable for Leica GPR1, GPH1 1Excellent Performance: Premium GPH1 prism assembly features copper coated prisms for consistent results. 2Assembly: Equipped with a 34mm offset prism and an 86mm HT, this prism is able to perform best work. Take it with confidence! 3Adjustable: Equipped with a brass connector, you can make adjustments according to your own needs. 4Protective Case: Equipped with a protective case, the prism can be well defended and ensure a long life span. 5Scope of Application: This prism is compatible with for Leica GPR1, GPH1. Remember to check the model before buying.1 x_x000D_ _x000D_ Prism