High carbon steel feeler coils are widely used by many industries as gauges to precisely measure clearances and as shims to accurately set spacing, our standard feeler gauge is conveniently available in 6" and 12" strips, and 25' coils. Our steel blades are made of the highest quality carbon steel. All blades are permanently marked with the thickness for easy identification. If you need further assistance with our High Carbon Steel Feeler Coils contact Thread Check today. High Carbon Steel Feeler coils are clearly marked with thickness every 6" and packaged in a clear reusable plastic container. 25' High Carbon Steel Feeler coils over .030 thick do not have size marked. * Feeler Gauge (Eastern Industries) high carbon steel feeler coils have a $50.00 minimum total order. Contact Thread Check with any questions or concerns you have about our High carbon steel feeler coils.