Hannabach Hannabach 815 MTC7S 7 Strings Set

"Hannabach 815 MTC7S 7 Strings Set, Set of Strings for 7-String Russian Guitar, Complete set of 7 strings, Based on the legendary 815 Silver Special, Treble strings: Carbon, Bass strings: silver-plated copper wire, Very balanced tension, For scales from 640 to 660 mm, Open G tuning: D' - B - G - D - B - G' - D', Made in Germany@+*Gauges:*, D'-1 Carbon 0.62 mm / .024"", B'-2 Carbon 0.71 mm / .028"", G-3 Carbon 0.86 mm / .034"", D-4 silver-plated 0.74 mm / .029"", B-5 silver-plated 0.83 mm / .033"", G'-6 silver-plated 0.96 mm / .038"", D'-7 silver-plated 1.19mm / .047"""