Precision Brand 09215 Steel Thickness Feeler Gage, 0.15mm Thickness, 12.7mm Width, 305mm Length (Pack of 12) Made from 1/2" wide, C1095 close grain, high carbon spring steel Never worry about conversion tables again with these True Metric thicknesses Used as shim stock to fill gaps and spaces in dies and machinery; can be used for short runs or prototype work Thickness is clearly marked every 6" Measures 12.7mm wide by 305mm long by 0.15mm