Martin's ukulele strings provide a comfortable playing experience, great tuning stability, and a warm, clear tone. The high-tensile fluorocarbon helps maintain tuning longer and enhances harmonic output for a consistent sound. Experience the powerful tone of Martin ukulele strings. Soprano and Tenor strings are made with clear fluorocarbon, while Baritone strings use clear fluorocarbon with aluminum wrap wire and silver-plated copper on nylon.