product -Quantity: 100Color: yellowSpecifications: 20x20mm/30x30mm/40x40mm/50x50mm/60x60mmMaterial: acrylicQuick positioning with a speedometer and all common measuring instrumentsLong-term monitoring of bridges and buildingsMeasure and monitor facades, even around cornersHeight and axis transfer around corners and from inside to outsideCan even be installed on difficult surfacesCrosshairs are printed on the backplate below the precise center of the reflective target to ensure permanent marking of the measurement point. If the reflective target is damaged at any point, it can be easily replaced and the original measurement point can be restored quickly, easily and inexpensively.Application: tunnel engineering, subway engineering, bridge engineering, building construction, slope monitoring, ship inspection, etc.Package includes:100* Reflector