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 Multicolor Nickel-Plated Steel. Hexagonal Core Wire with Ball End. Perfect tool for learning and teaching guitar- 6 strings, 6 colors 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