Worth CH-LGEX Heavy Uke Set

LOW G, "EXTRA" VERSION 4th STRING - Clear strings are 100% fluorocarbon nylon for a brighter, more forward sound compared to the Worth brown strings, heavy tension, 63" long (enough for 2 sets ). String gauges are 0224 (.57mm), 0291 (.74mm), 0319 (.81mm), 0433 (1.10mm). Made in Japan. These strings are primarily intended for tenor, but may be used on soprano or concert ukes. However, the user should be aware of the increased tension load and how it might impact their specific instrument. "EXTRA" seems to refer to increased diameter of the 4th string.