Features [High Precision Ground Topography] This mini prism is designed for use with total stations, using a 17.5mm constant to reduce errors and ensure millimetre-level accuracy in ground measurement. [Precision Frosted Glass Components] The mini prism features precision-ground glass components that are meticulously crafted to ensure overall measurement accuracy, delivering reliable and consistent results in surveying applications. [Heavy Duty Housing] The shell of the mini prism is constructed of tough polymer, able to withstand various weather conditions and daily wear and tear, ensuring long-lasting performance in the field. [Versatile Applications] This mini prism is suitable for a wide range of applications including tunnels, subway construction, mining, road inspection, and more, making it a versatile tool for various surveying and engineering projects. [4 Prism Poles] The mini prism comes with four measuring poles, allowing for easy assembly and disassembly, providing convenience and flexibility. 1. [High Precision Ground Topography] This mini prism is designed for use with total stations, using a 17.5mm constant to reduce errors and ensure millimetre-level accuracy in ground measurement. 2. [Precision Frosted Glass Components] The mini prism features precision-ground glass components that are meticulously crafted to ensure overall measurement accuracy, delivering reliable and consistent results in surveying applications. 3. [Heavy Duty Housing] The shell of the mini prism is constructed of tough polymer, able to withstand various weather conditions and daily wear and tear, ensuring long-lasting performance in the field. 4. [Versatile Applications] This mini prism is suitable for a wide range of applications including tunnels, subway construction, mining, road inspection, and more, making it a versatile tool for various surveying and engineering projects. 5. [4 Prism Poles] The mini prism comes with four measuring poles, allowing for easy assembly and disassembly, providing convenience and flexibility. Specification: Item Type: Total Station Topographic Prism Material: K9 optical glass, ABS Effective diameter: approx. 25.4mm/1 inch Constant: +17.5 mm Application: Ideal for railways, tunnels, mines and roads, suitable for measuring instruments. Usage: Widely used in industries such as subways, railways, tunnels, dams and steep slopes. Packing list: 1 x Mini Total Station Prism 1 x cover. 4 x Measuring Rods 1 1 storage bag Package List 1 x Total Station Mini Prism 1 x Cover 4 x Measuring Rods 1 x Storage Bag