Rich color tone. Strong durability. Multi-layered surface of the alloy does not oxidize over time. Suitable for experienced guitarists. Uses a hexagonal core made of medium carbon steel and full automatic winding technology for a smoother feel. Nickel alloy material enhances sound richness. Model: VX120 Inner Material: Hexagonal Core Outer Material: 10% Nickel Alloy Wire Color: As shown in the image Size: G: 040 inches / 1.02 mm D: 060 inches / 1.52 mm A: 080 inches / 2.03 mm E: 100 inches / 2.54 mm Material: Hexagonal Metal Core Product Packaging Size: 18*15*1cm Package Contents: 1* Strings (4pc/set) Only the above package contents are included; other products are not included. Note: Lighting and different screens may cause slight color differences between the product in the image and the actual item. The allowed measurement error is +/- 1-3 cm.