Item Type: Crack Monitor <br>Product Material: Acrylic <br>Use: Measuring Instrument <br>Weight: 36g / 1.27oz<br>1、Graduated Accuracy: The product consists of a accuracy caliper with two plates which overlap a portion of the length. The bottom plate is calibrated in millimeters and the top plate is transparent and marked with a cross shaped thin line cursor. <br>2、Testing Table: Crack monitoring gauges are used to control cracks in walls and how they evolve over the measurement time. Prime polymer with easy to read measurement grating. <br>3、Fixed Post: The redesigned fixing posts make it easy to fix the two pieces together without the need for glue. <br>4、Easy to Record: Provide a crack record sheet and secure with screws. The opening or closing of the crack can then be recorded on the record sheet. <br>5、Lightweight and Convenient: The product is made of prime acrylic plate is small and easy to carry, lightweight and easy to use.<p>2 x Crack Monitor&nbsp;&nbsp;<br></p><p>4 x Expansion Tube</p><p>4 x Screws</p><p>1 x Instruction Manual</p>