The Swedish nyckelharpa has experienced a great renaissance in recent decades.;It has its roots in the county of Uppland, north of Stockholm, where Prim Strings are manufactured.;Prim has been making nyckelharpa strings since the 1980s and is now the only manufacturer in the world.;Strings: C4 - G3 - C2 - A1;Tuning tones: c - g - c' - a';Chrome steel wound;Single strings in soft and medium. Set in medium;