Hannabach Strings for classic guitar Special model - Set (815MTC7S)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 640660 mm