D'Addario J90 Fiddle Strings are the ultimate must-haves for old-style bluegrass and country fiddling. Crisp, reliable nickel flat wound on a steel core, D'Addario Fiddle Strings have a brilliant tone with quick bow response, and are stable in tuning. Excellent for use on electric instruments using either magnetic or Piezo-type pickups. Available in 4/4 scale, medium tension only. • MFSKU J90 • UPC 019954162115