The PosiTest DFT Coating Thickness Gage for measuring coating thickness on metal substrates is an economical choice that retains the uncompromising quality of DeFelsko Inspection Instruments." /> The PosiTest DFT Coating Thickness Gage for measuring coating thickness on metal substrates is an economical choice that retains the uncompromising quality of DeFelsko Inspection Instruments." /> The PosiTest DFT Coating Thickness Gage for measuring coating thickness on metal substrates is an economical choice that retains the uncompromising quality of DeFelsko Inspection Instruments." />