40-90 Gauge Short Scale Rotosound Swing bass

SWING BASS 66
 
This is the roundwound string that James How and John Entwistle perfected into what was to become the industry standard.
The bright, punchy, high-energy sound of Swing Bass 66 bass guitar strings is a major part of early rock music history and brought the bass player from the back line to the front of the stage.