Features:- Tone color is thick.- Strong durability.- The surface of the alloy is multilayered.- Long time is not oxidized.- Suitable for senior guitarists.- Adopt hexagon alloy and full automatic winding technology, smoother and softer.- The phosphor bronze material makes the sound more plump and rich.Model: QA170Inner Material: Hexagonal alloyExternal Material: 85/15 phosphor bronzeColor: As picture showsSize:- E: 012 inch / 0.30 mm - B: 016 inch / 0.41 mm - G: 024 inch / 0.61 mm - D: 032 inch / 0.81 mm - A: 042 inch / 1.07 mm - E: 053 inch / 1.34 mmPackage Weight : 40 G / 1.41 OuncesPackage Dimensions (L*W*H) : 115*105*5 MM / 4.53*4.13*0.20 InchesRetail Packaging: Yes, General BoxPackage Include:1 x 6pcs/set Guitar Strings