Curt Mangan Fusion Matched strings 10 – 22 Pure Nickel gauges: 10 – 13 – 17 – 26 – 8 10 12 14 16 18 The length of the string length 43 inches (109 cm) on all guitar during the 1950s to the centre of the 60 Pure Nickel strings have been used. Pure Nickel sounds warmer than nickel plated steel and is used by many playing blues & Jazz artists.