Accompaniment Set (13 strings) / Concert Zither “Bergfee Steel” (red) Vienna Tuning – As0 – Gis12 (as’ – gis) Scale length: 41,5 cm Finest steel with very little silk, wound with a fine silver plated wire Great for acoustic playing and electromagnetic sound transmission CONCERT ZITHER Bergfee Steel Red is our strongest zither string. It is manufactured with very little silk (on a steel core) and is powerful in tone (stronger and more aggressive sound than Nylon Blue). This string is perfectly suitable for the sound pickup, too.