Feeler Gauge Set Finish Unfinished Blade Length 5 in Blade Material Steel Blade Style Straight Blade Dimension Type Inch/Metric Included Certification Certificate of Conformance Maximum Thickness - Inch 0.025 in Maximum Thickness - mm 0.635 mm Minimum Thickness - Inch 0.001 in Minimum Thickness - mm 0.025 mm Non-Marring No Number of Feeler Blades 20 Thickness Range 0.001 in to 0.025 in