Material : JIS G 3522 (Music spring wire is a steel wire with long history that the strength is given by the special heat treatment and cold drawing process by using special high quality high carbon steel wire rods. This process is similar as hard drawn steel wire, but music spring wire is manufactured more politely, and under severe quality control) Di jual per SET. (jumlah batang per set lihat angka dalam kurung di bagian pilihan) Semua panjangnya 300 mm (30cm)