Feeler Gauge Set, Finish Unfinished, Blade Length 3 1/32 in, Blade Material Steel, Blade Style Short Blade, Dimension Type Inch, Included Certification None, Maximum Thickness - Inch 0.035 in, Minimum Thickness - Inch 0.0015 in, Non-Marring No, Number of Feeler Blades 31, Thickness Range 0.0015 in to 0.035 in, Tolerance +/-0.00025 in