Set of 6 metal strings for acoustic guitars.The 1st and 2nd wires are stainless material.And the other 4 wires are coated steel cores with copper alloy coilsdurable and strong Provides clear sound and sound.Great replacement for your old acoustic guitar strings.Cable: -SL Super Light/ -L LightNotes/inches/MM: E-1st/.011/0.28; B-2nd/.015/0.38; G-3rd/.024/0.61; D-4th/.032/0.81; A-5th/.042/1.07 ; E-6th/.052/1.32 (-SL)E-1st/.012/0.30; B-2nd/.016/0.41; G-3rd/.024/0.61; D-4th/.032/0.81; A-5th/.042/1.07; E-6th/.053/1.35 (-L)Colour: as shownMaterial: Stainless Steel + Coated Copper AlloyPackage Contents:6 * Guitar StringOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.