100 pcs. Reflective tape Reflective target sheets for tunnel engineering 4 cm x 4 cm Description: Feature: Fast positioning za using all popular measuring instruments. Long-term bridges and buildings: Measurements and facades, even around corners. Move height and axis around corners and from the inside to the outside. They can be installed even on difficult surfaces. Reflective Sight Sheets: The crosses are printed on the back plate below the center of the glare for lasting measurement marking. If the glare is damaged, it can be easily replaced. The original measuring point can be restored quickly, easily and inexpensively. Application: tunnel engineering, bridge engineering, building construction, slope, ship inspection, etc. Material: made of acrylic material,. Specification: Material: acrylic The package includes: 100 reflective target sheets