Precision Brand Coiled Steel Feeler Gages Feeler gage is made from 1/2-inch wide spring steel stock, close grain C1095 high carbon steel. Material is ground and polished to precision tolerances. Thicknesses are clearly etched every 6-inch in decimal and metric. Feeler gage stock is packaged in 5-inch or 12-inch flat lengths, 25 feet coils and in convenient assortments. 0.001-inch to 0.023-inch coils are conveniently packaged in dispenser boxes Pack of 25