Chromesteel-wound steel core — clear, bright, and powerful. Swedish precision-made, trusted by students and professionals. Available in full and fractional sizes. Medium gauge.  Strings should generally be changed every 6–12 months, though students usually change them less frequently. Even if strings haven't broken, they gradually lose their brilliance and responsiveness — if your instrument sounds dull or takes longer to settle in tune, it's time for a fresh set.