.* Durability and excellent sound are essential for a good string, and each set of Orphee CAYE strings are guaranteed to give you a great sounding experience.* The inner cord uses hexagonal steel cores, the outer line is made of stainless steel wire.* It feels a little heavy and the sound is bright.* Extremely light and high quality, It has a long service life. Specifications:Brand: OrpheeModel: EW7300, EW7400, EW7500Material: Nickel Alloy Wounds + Hexagonal Steel CoresType: Electric Guitar Strings Gauge:EW7300: 0.009, 0.011, 0.016, 0.024, 0.032, 0.042 (inch)0.23, 0.28, 0.41, 0.61, 0.81, 1.07 (mm)EW7400: 0.009, 0.011, 0.016, 0.026, 0.036, 0.046 (inch)0.23, 0.28, 0.41, 0.66, 0.91, 1.17 (mm)EW7500: 0.010, 0.013, 0.017, 0.026, 0.036, 0.046 (inch)0.25, 0.33, 0.43, 0.66, 0.91, 1.17 (mm)Package List:1 Set Electric Guitar Strings