Set / Violin 1/2 Gauge: medium e” steel, with ball end a’ nylon/aluminium wound d’ nylon/aluminium wound g nylon/silver wound Synflex Violin – Nylon strings with the sound character of gut strings. Nylon strings of highest quality. The nylon multifilament core is wound with a metal wire (aluminium, or silver). The sound character of these strings is quite similar to that of gut core strings. However, the Synflex strings are more durable and have a better tuning stability, compared to gut strings.