Features: Metal strings set for acoustic folk guitars, 6pcs/set. The 1st & 2nd strings are stainless steel material. And the other 4 strings are steel core with silver-plated copper alloy winding. Durable and sturdy, providing you with clear and bright sound. Great replacement for old strings of your acoustic guitar. Specifications: Tension: A306-XL Extra Light/ A306-SL Super Light(optional) Note/Inch/MM: E-1st/.010/0.25; B-2nd/.014/0.36; G-3rd/.023/0.58; D-4th/.030/0.76; A-5th/.039/0.99; E-6th/.047/1.19 (A306-XL) 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 (A306-SL) Package size: 11.5 * 11.5 * 0.5cm / 4.5 * 4.5 * 0.2in Package weight: 32g / 1.1oz Note: The guitar showed in the picture is not included. Package List: 1 * Set of Guitar Strings(6pcs)