Nylon/silver wound classical guitar strings in proven Hannabach quality;Single strings and complete sets are available;Made in Germany;Please specify the exact scale length for special orders;String set for 7-string Russian guitar;Based on the legendary 815 Silver Special;Complete set consisting of 7 strings;Treble strings carbon, bass strings silver-plated copper wire;Open G tuning: d' - h - g - d - H - G' - D';Very balanced tension;For scales 640–660 mm;Diameters and tensions:;d-1: 0.61 mm/.024", 6.5 kg/14.61 lbs;h/b-2: 0.71 mm/.028", 7.0 kg/15.73 lbs;g-3: 0.86 mm/.034", 7.0 kg/15.73 lbs;d-4: 0.74 mm/.029", 7.5 kg/16.86 lbs;B-5: 0.83 mm/.033", 7.5 kg/16.86 lbs;G-6: 0.96 mm/.038", 7.0 kg/15.73 lbs;D-7: 1.19 mm/.047", 7.0 kg/15.73 lbs;Set tension: 49.5 kg/111.25 lbs;Individual strings available on request;