D'Addario BW020 Guitar string

.020" Single Acoustic Guitar String for Replacement and Custom Sets

The D'Addario BW020 is a single .020" gauge string from the 80/20 Bronze Wound Singles series, designed specifically for acoustic guitar. This string serves as a direct replacement or as a building block for custom string sets, giving players full control over their gauge configuration. The 80/20 bronze alloy — co-created by John D'Addario Sr. and John D'Angelico in the 1930s — is the original acoustic string formula, prized for its bright, crisp, and projecting tonal character. Round wound construction and a nickel-plated steel wrap deliver an extra-bright tone mixed with deep, projecting bottom end. All D'Addario strings are designed, engineered, and manufactured in the USA at the company's New York production facility.

Technical Specifications

• Gauge: .020" / 0.51 mm
• Number of Strings: 1
• Material: Nickel-Plated Steel
• Winding Type: Round Wound
• Finish: Coated
• Compatible With: Acoustic Guitar

Who It's For

This single string is the right choice for acoustic guitar players who need a .020" gauge replacement without buying a full set. It suits players who prefer the bright, crisp tone of 80/20 bronze — a traditional alloy favored for recording and by vintage enthusiasts. The string works well for those building custom gauge combinations, experimenting with hybrid setups, or keeping a spare on hand for unexpected breakages. Round wound construction and a coated finish make it a practical option for players who want consistent tone and extended string life.