12-String Acoustic Guitar Strings, Light Tension, Coated, Standard Tuning, Coating Material: Phosphor Bronze, Extended Life Treatment on each string, preserves the natural tone and feel of uncoated strings, High-Strength Steel Wire 131% carbon content and Fusion Twist technologies that provide tuning stability and unparalleled resistance to breakage, stay in tune better than traditional strings, last at least 4 times longer than traditional uncoated strings, resealable internal gasket for facilitate opening and storage of unused strings, gauges: .0100, .0100, .0140, .0140, .0230, .0080, .0300, .0120, .0390, .0180, .0470, .0270.

Acoustic Guitar Strings, 13-56, Extra Light Tension, Smooth Feel, Ultra Thin Film Coverage On Each Wound String, Unique Polymer Treatment On Plain Steels, High Protection Level, NY Steel High Carbon Steel Core, plain wound, Fusion Twist technology, break resistance and tuning stability, wounds fully protected from contaminants, recyclable 100% packaging, gauges: 13, 17, 26, 35, 45, 56.