CRACKMON 4020A Concrete Crack Monitor ContractorPAK (18-Pack)， Includes Epoxy Adhesive<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Kit contains (18) CRACKMON® 4020A crack monitors and (3) syringes 5-minute structural epoxy</li><li>High-quality thermoplastic with easy-to-read measurement grid</li><li>±1 mm (±0.04") resolution on X-Y axes</li><li>±20 mm (±0.79") horizontal and ±10 mm (±0.38") vertical range</li><li>Bonus! Includes (1) CRACKMON® 224R Crack-Width Comparator - conforms to ACI 224R-01</li></ul></div><img src="http://ecx.images-amazon.com/images/I/61GFOvoigtL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31EkqtfILBL.jpg" noproxy>