Description: Crack Gauge Monitor is made of high-quality acrylic material, so it is durable, sturdy, smooth, wear-resistant, and not easy to break. It can monitor cracks in walls and how they evolve measured. Specification: Material: Acrylic Size: about 10*3*0.9cm/3.94*1.18*0.35inch Weight: about 50g Uses: Can be used to monitor wall deformation/cracks Packing List: 1pcs*gap gauge Notes: 1. Due to the different display and lighting effects, the actual color of the product may be slightly different from the color shown in the picture. 2. Due to manual measurement, please allow a measurement deviation of 1-3cm. See more product details 1.Not Easy to Break: Because our Crack Gauge Monitor is made of high-quality acrylic material, it is durable, sturdy, smooth, wear-resistant, and not easy to break. 2.Clear and Precise: Crack Monitor is designed with a highly clear acrylic sheet and an easy-to-read measurement grid, so it is clear and precise. It is very practical. 3.Crack Monitoring: Corner Crack Monitor is a simple and cool analog crack monitoring device and a precision instrument used to monitor the horizontal or vertical movement of cracks on a plane. 4.Convenient for You: Because our Crack Monitoring Gauge can monitor cracks in walls and how they evolve measured, it is very practical and convenient for you. 5.Transparent Top Plate: Consists of two boards that overlap for part of their length, our Crack Measurement Tool is very practical. It also has a transparent top plate.