Description: Feature: Quick positioning with a speedometer and all common measuring instruments. Long Term of Bridges and Buildings: Measure and monitor facades, even around corners,Height and axis transfer around corners and from inside to outside,Can even be installed on difficult surfaces. Reflective Adhesive Target Sheets: Crosshairs are printed backplate below the precise center of the reflective ensure permanent marking of the measurement If the reflective damaged at , be easily replaced original measurement point can be restored quickly, easily and inexpensively. Application: tunnel engineering, bridge engineering, building construction, slope , ship inspection, etc. Material: Made of Acrylic material, durable. Specification: Material: Acrylic Package Includes: 100 Reflective Adhesive Target Sheets Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.