Flat Length Steel Feeler GaugeFeeler Gage is made from 1/2" wide spring steel stock, close grain C1095 high carbon steel. Used in manufacturing, tool and die, and maintenance operations wherever setting close spacing or checking extremely tight tolerances is required. Hardened and tempered to RC 48-62. Thicknesses are clearly etched every 6" in decimal and metric. Also available in bulk quantities. Other sizes or thicknesses are available on special order. Length: 12 in; Material: Steel C1095; Measuring System: Inch; Packing Type: Box; Quantity: 12 per box; Thickness: 0.0020 in; Thickness Tolerance (-): 0.00020 in [Min]; Thickness Tolerance (+): 0.00020 in [Max]; Type: Feeler Gage; Width: 1/2 in; Weight: 0.16 lb.