The tone is and warm with abundant harmonics.Sound is clear and .Each string comes in an individual package and is placed together in a bag.Proprietary rust layer, increase life of strings, and have better sound, magnetic and penetration.Color of exterior strings,uniform color,sound excellently,moderate soft,average stretch,another string harness by the dozens of nylon ,greatly increasing strings life.Colored are not only beautiful, but also player can first time to distinguish each of strings.Colour: multicolorMaterial: nickel alloy + nylonPackage Contents:6 * Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.