1、Perfect string replacement universal for folk guitar. 2、1st, 2nd and 3rd strings adopt for high quality stainless steel core. 3、4th, 5th and 6th strings are steel core with copper alloy wire wound. The string set is universal for folk guitar, it features stainless steel core, coated copper alloy wound, with proprietary anti-corrosive technology. An optimal combination of clear timbre, comfortable feeling and excellent durability, great easy to play, pretty suitable for primary guitar players. Features: Perfect string replacement universal for folk guitar. 1st, 2nd and 3rd strings adopt for high quality stainless steel core, great durability. 4th, 5th and 6th strings are steel core with copper alloy wire wound, strong tightness and high brass glossiness. Proprietary anti-corrosive coat process for keeping the strings always be fresh. Automatically winding strings production ensures it stable and harmonious sound. Easier fingering, medium tension, idea for primary players and musical lovers. Specifications: Material(1st, 2nd and strings): Steel Material(4th, 5th and 6th strings): Steel Core / Copper Alloy Wound Tension: Medium Note/inch/mm: E/009/0.22; B/012/0.29; G/015/0.36; D/025/0.61; A/035/0.85; E/045/1.10 Package Size: 11.2 * 11.2 * 0.5cm / 4.4 * 4.4 * 0.2in Package Weight: 25g / 0.9oz Package List: 1 * Set of String Note: The guitar is not included. 1 * Set of String Note: The guitar is not included.