Rapid RH® 4.0 EX Complete Starter Kit Fahrenheit – 880-R0002-008 Successful floors are built on a solid understanding of subfloor moisture content measurement. We give you a confident place to stand. Field-Tested to Meet ASTM F2170 Standards The Rapid RH® 4.0 EX gives flooring and building professionals the concrete moisture data they need to meet ASTM F2170 standards.
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