Gibson Flatwound Electric Guitar Strings are precision-wound with flat, stainless steel ribbon wire which provides a rich & mellow tone while eliminating ambient noise from finger movement. Used exclusively on all arch top guitars built in our Custom Shop facility in Nashville, TN, Gibson Flatwound Electric Guitar Strings are the best set of strings to achieve a smooth jazz sound. Ultra-Light Gauge: .011 .015 .022w .030 .040 .050