Feature: 1. OPTICAL GLASS LENS: The prism of the total station is made of optical glass, featuring neat cuts and a refined surface for a strong visual appeal. 2. COPPER COATING: The surface is copper coated to ensure durability, with smooth lines, firm construction, and vibrant colors that are resistant to deformation and fading. 3. ENHANCED REFLECTIVITY: The optical glass enhances the prism's reflection capability, providing a full-bodied, clear, and bright measurement for more accurate and long-lasting results. 4. PRISM CONSTANT: When used with Leica total stations, the prism constant is set to 0mm. This surveying prism is suitable for GPR1, GPH1. 5. SUPERIOR CRAFTSMANSHIP: Meticulous attention to detail, excellent workmanship, and precision polishing create a prism of exceptional quality and superior performance. Specification: Item Type: Total Station Prism Material: Optical Glass, ABS Prism Constant: 0mm (for Leica total station) Connector Type Diameter: Approx. 12mm / 0.47in hole Suitable for Leica GPR1, GPH1 Package List: 1 x Total Station Prism 1 x Cover