AIRBLAST® WFT-450 Wet Thickness Gauge, 25 - 2,000 μm (1 - 78 mils), stainless steel, for measuring wet film thickness (WFT) during application. The WFT-450 Wet Film Thickness Comb is a precision machined hexagonal tool, made from heavy gauge stainless steel for high accuracy and is available in both metric and imperial units. Includes a section for measuring the radius R2 of the outer edges. After use, solvents can be used to clean the instrument to ensure the accuracy of future readings. The comb is supplied in a protective case. Complies with international standards ISO 2808-7B, BS 3900-C5-7B, ASTM D 4414-A, NF T30-125.