Specially developed for 12-string Rickenbacker guitars- Very balanced sound - from string to string and from octave to octave- Treble strings: bright steel, brass-plated- Wound nickel strings with specially polished surface for noise-free playing and long durability- Gauges: .010/.010, .013/.013, .020/.010, .025/.013, .035/.020, .044/.025- Tension: 114.1 kg with scale 648 mm (25.5")