1、Perfect 6pcs string set universal for folk guitar replacement. 2、1st and 2nd strings made of high quality stainless steel core. 3、3rd, 4th, 5th and 6th strings are steel core with copper alloy wound. The string set is universal for folk guitar, it features stainless steel core, coated copper alloy wound, with proprietary anti-corrosive technology, its soft and warm timbre, strong durability, perfect for guitar players and professional performance. Features: Perfect 6pcs string set universal for folk guitar replacement. 1st and 2nd strings made of high quality stainless steel core, strong toughness. 3rd, 4th, 5th and 6th strings are steel core with copper alloy wound, great tightness and high brass glossiness. Automatically winding strings production provides it even quality and clear, soft and warm tone. Special anti-corrosive coated technology for extending its life time. Medium tension, perfect for solo and professional performance. Specifications: Material(1st and 2nd strings): Steel Material(3rd, 4th, 5th and 6th strings): Steel Core / Copper Alloy Wound Tension: Medium Note/inch/mm: E/011/0.28; B/015/0.38; G/024/0.61; D/032/0.81; A/042/1.07; E/052/1.32 Package Size: 11.2 * 11.2 * 0.5cm / 4.4 * 4.4 * 0.2in Package Weight: 30g / 1oz Package List: 1 * Set of String Note: The guitar is not included. 1 * Set of String Note: The guitar is not included.