<p>Crack Monitoring Telling about Crack Monitor Simple and cool analog crack monitoring device. &plusmn;1 mm (&plusmn;0.04") graticule on X-Y axis; &plusmn;0.5 mm (&plusmn;0.02") resolution &plusmn;20 mm (&plusmn;0.79") horizontal range and &plusmn;10 mm (&plusmn;0.38") vertical range High-quality polymer with easy-to-read measuring grid Crack monitoring scales are used to monitor cracks in walls and their evolution over a measured time. parameter:</p> <p>Material: acrylic</p> <p>Size: 10*3*0.9cm</p> <p>Weight: 36 grams</p> <p>Packaging: OPP</p> <p>Purpose: Can be used to monitor wall deformation/cracks</p> <p>Packing list: 1 pair of monitors + 4 screws + 1 monitoring table</p> <p>Features:</p> <p>1. Easy to install, waterproof, sunproof, wear-resistant and scratch-resistant</p> <p>2.1:1 original export, high transparent acrylic plate is clear and precise</p> <p>3. Crack monitoring gauges are used to monitor cracks in walls and how they evolve over time by measuring</p>