Thank you for viewing. 【Quality and Material】 These violin strings use stainless steel and a steel core, combining durability and sound quality. 【String Set】 A complete set of strings from 1st to 4th is included, allowing you to start playing immediately. Each string is labeled. - Product Name: Violin Strings - Material: Stainless Steel, Steel Core - String Details: E-1st: Steel Core, A-2nd: Steel Core + Cupronickel Winding, D-3rd: Steel Core + Cupronickel Winding, G-4th: Steel Core + Cupronickel Winding