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Thomastik Thomastik

Thomastik JF345 Flatwound 5-String Jazz Bass Strings

138.95 $138.95
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Sweet jazz tone with serious thump.

Nickel flatwound roundcore Jazz Series bass strings from Thomastik-Infeld boast extended durability and high output fundamentals with smooth, warm, balanced tone. A highly flexible steel core gives these bass strings a balanced feeling and special character. The overall sound characteristics can be described as very close to the double bass. 5-string set with gauges: .043, .056, .070, .100, and .136.


  • Nickel flatwound roundcore
  • Extended durability
  • High output fundamentals
  • Smooth and balanced
  • Highly flexible steel core
  • Gauge: .043, .056, .070, .100, and .136

String up your bass with these world-class strings. Buy today!


JF345 Flatwound 5-String Jazz Bass Strings Specifications:

  • G”STRING: Gauge: .043 in.; Tension: 37.03 lbs.
  • D”STRING: Gauge: .056 in.; Tension: 37.47 lbs.
  • A”STRING: Gauge: .070 in.; Tension: 31.30 lbs.
  • E”STRING: Gauge: .100 in.; Tension: 34.39 lbs.
  • B”STRING: Gauge: .136 in.; Tension: 34.83 lbs.

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