Rotosound SB11 Contact Core Phosphor Bronze Light Gauge Acoustic Guitar Strings (11 15 22 30 42 52), White Black Red Blue, Small Medium Large X-Large 2X-Large

Made in the UK, The Jumbo King Phosphor Bronze string with Piano String design technology. Core wire lies directly on the bridge insert Developed in 1974 and became known as the "Superwound" and "Lowden" strings. Today it is called Super Bronze, with its 92/8 alloy first choice for long sustain and brilliance. Developed by Rotosound in 1974, Super Bronze is the string of choice for long sustain. Using patented Piano String Design technology on 92/8 phosphor bronze windings, it also offers unsurpassed presence and brightness.