Color: Copperplated 5s Product overview This small L shaped rightangle prism is a precision measurement accessory available in two coating options. It delivers tight angular accuracy and reliable reflectivity for use with total stations and other surveying instruments. The copper coated version includes an antireflection layer to reduce closerange measurement error. Key benefits Precise rightangle measurements: L shaped design provides stable, repeatable 90 degree references for angle marking and T angle tasks. Improved reflectivity and closerange accuracy: Copper coating boosts light reflectivity while the antireflection layer lowers measurement errors at short distances. Total station compatibility: Designed to work seamlessly with total stations, simplifying setup and improving survey efficiency. Tunable for field needs: Precisionadjustable angles and clear center marking and angle rulers support fast, accurate alignment and layout. Surveygrade performance: precision model suited for construction layout, tunnel monitoring, and any application requiring reliable rightangle references. Specifications Accuracy: 5 seconds, Copper Coated, Precision Model Accuracy: 5 seconds, Silver Coated, Precision Model Prism constant: 25 Color option noted: Copperplated 5s Form factor: Small rightangle L shaped prism Coatings: Copper coated with antireflection layer; also available in silver coated finish Important measurement note For the same total station and the same operating environment, the lower the second count, the longer the achievable measurement distance. Typical applications Construction layout and Tangle marking: Fast, accurate rightangle references for foundations, column lines, and structural grids. Tunnel and subway surveying: Center marking and precise angle measurement for monitoring, alignment checks, and asbuilt verification in confined spaces. Engineering and site control: Use as a control point for angle setting, staking out right angles, and checking perpendicularity during installation of equipment or structures. What makes it stand out The copper coated 5 second model combines enhanced reflectivity and an antireflection layer to reduce closerange error while maintaining surveygrade angular accuracy. The L shaped prism geometry and builtin angle rulers provide an intuitive working reference for field crews, reducing setup time and measurement uncertainty. Compatible with standard total stations and geared toward professional surveying and construction workflows where precise rightangle measurement is required. Included features for field use Compact, portable L shaped prism design for easy placement in tight areas Clear center marking and angle rulers for repeatable alignment Precisionadjustable angle settings for fine tuning on site This product is intended for professional surveying and construction use where accurate rightangle measurement and reliable total station compatibility are required.