Specifications:Features:- Tone color is thick.- Strong durability.- The surface of the alloy is multilayered.- Long time is not oxidized.- Suitable for senior guitarists.Model: SA-39Inner Material: Six Angle Steel CoreExternal Material: 90/10 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 : 50 G / 1.76 OuncesPackage Dimensions (L*W*H) : 130*110*5 MM / 5.12*4.33*0.20 InchesRetail Packaging: Yes, General BoxPackage Include:1 x 6pcs/set Guitar Strings