HI-DEF NEON colored Electric Guitar strings: light 9-42 Designed to give your stage presence a little extra pop, especially under UV black lighting Material: K3 Luminescent Neon Yellow Nickel-Plated Steel. Hexagonal Core Wire with Ball End. All strings include the neon colored K3 coating, delivering longevity, more projection, fewer unwanted overtones, plus enhanced clarity and articulation 9, 11, 16, 24, 32, 42 Set of Six Strings Made in US, New Jersey by DR Music Inc Free Replacement against manufacturing defects only for the products imported by Trimac Products Private Limited contact