Thomastik-Infield Jazz Swing Flat Wound Strings.
Favoured by professional jazz players worldwide, the Thomastik Jazz Swing strings feature a true round core, which vibrates freely with no preferred motion axis. The flat ribbon windings are highly polished pure nickel, for a supple and responsive feel. Silk wrapped ends anchor the windings for extended playing life.
Gauges:
1st - .012
2nd - .016
3rd - .020 (Wound)
4th - .27
5th - .37
6th - .50