OPTIMA 24K GOLD STRINGS Developed and handmade in Germany from the finest materials for the highest tonal demand, these are probably the most precious strings in the world. This series reflects our 100 years tradition of string making. The result is a string of unmatched premium quality, coated with real 24 Karat Gold, which makes them insensitive to tarnishing or corrosion, and suitable for people allergic to nickel. They carry a wider spectrum of overtones and dynamic range, and their durability, compared-to standard strings is up to three times higher. OPTIMA 24K GOLD STRINGS are characterized by the brilliant SOUND OF GOLD, very much loved by Frank Zappa and Brian May.