GHS Silk/Phospor Bronze Light Acoustic Guitar Strings (12-54) Silk/Phospor Bronze Light Acoustic Guitar Strings (12-54) GHS Silk and Bronze acoustic guitar strings feature a unique silk and steel core wound with Phosphor Bronze cover wire to create a warm, mellow tone with a soft feel Silk &amp; Bronze strings are ideal for live performances and have impressive sustain and low finger noise for the studio Gauges: 12-16-24-32-42-54 GHS Silk and Bronze acoustic guitar strings feature a unique silk and steel core wound with Phosphor Bronze cover wire to create a warm, mellow tone with a soft feel Silk &amp; Bronze strings are ideal for live performances and have impressive sustain and low finger noise for the studio