- Nickel-plated steel - Crisp tone, as with an uncoated string - The Optiweb coating provides a natural touch and protects against common corrosion and the collection of dirt for a long-lasting sound - Anti-rust coating on non-wound steel strings ensures longer lasting sound quality for the entire set - String thickness: .010, .013, .017, .026, .036, .046, .056 - Made in USA EUR 17.00 - See more - Buy online