Item Type: Guitar String Material: Electric Guitar Strings: Nylon + copper alloy winding Acoustic Guitar Strings: Stainless steel + copper alloy winding Electric Guitar Strings: Steel wire + nickel-plated alloy winding Package List 6 x Guitar String 1Classical guitar strings use nylon string cores, which are comfortable and glossy to the touch and moderately soft. 2Silver-plated copper alloy winding is anti-oxidation and anti-rust, with bright tone and strong penetrating power. 3The acoustic guitar strings are made of stainless steel core, the copper alloy winding is rust-proof and not easy to break, and the vibration is even. 4The electric guitar strings are made of highgrade steel wire strings, wound with nickelplated alloy, and sealed to prevent oxidation of the strings. 5These strings are of stable and durable quality and moderate tension, which is very suitable for beginners to practice.