Ziko Acoustic Guitar Strings Coated Phosphor Bronze Rust Upgrade Individual Packing Musical Instrument Using the best manufacturing materials in the recognized folk strings, the true tone of the wood is restored, the bass is thick, and the graininess of phosphor bronze highlights the full tone. Strings 1-6 are made of American high carbon steel hexagonal steel core with high tone output balance as the inner line. Type: DPP-011 / DPP-012size: 980mmMaterial: American Hex Alloycolour: As shownPackage Contents:1 set x Acoustic Guitar StringsOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.