1、Hexangular steel core ensures force equality and stability. Phosphor bronze of wire wound, durable and rustproof. 2、Bright and rich tone, with vibration balance to ensure continuity and steadiness. 3、Reliable quality, strong durability, high gloss. Smooth and slightly hard feeling, comfortable to use. 4、6 pcs strings in 1 sealed package, electroplating end balls with different serial numbers for identification. 5、Perfect string replacement for acoustic guitar. Both for primary guitar players and professional performance. This acoustic guitar strings set is an optimal combination of bright and rich tone, stable performance and strong durability. Perfect choice for guitar players or enthusiasts. Features: Hexangular steel core ensures force equality and stability. Phosphor bronze of wire wound, durable and rustproof. Bright and rich tone, with vibration balance to ensure continuity and steadiness. Reliable quality, strong durability, high gloss. Smooth and slightly hard feeling, comfortable to use. 6 pcs strings in 1 sealed package, electroplating end balls with different serial numbers for identification. Perfect string replacement for acoustic guitar. Both for primary guitar players and professional performance. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Model: S-012 Material: Hexangular Steel Core + Phosphor Bronze String Diameter (Note/inch/mm): 1E/.012/0.30; 2B/.016/0.41; 3G/.024/0.61; 4D/.042/1.07; 5A/.042/1.07; 6E/.053/1.35 Package Size: 5.25 * 0.5 * 4.75cm / 2.07 * 0.20 * 1.87in Package Weight: 37g / 1.31oz Package List: 1 Set of Acoustic Guitar Strings 1 Set of Acoustic Guitar Strings