.009 .011 .016 .024w .032 .042 - 24 Karat Gold Plated, Roundwound, Hexagonal Core - How would his hits have sounded if Brian May had used conventional strings? But he decided for the SOUND OF GOLD and we are proud that our strings made a small contribution to Brian May's great success. BRIAN MAY Signature is a phrase coordinated with Brian that was developed with him and especially for him. A highlight of the string making art. The Plain Steel strings are made of high quality, nickel-plated steel wire and are additionally coated with real gold. The wound strings are wrapped with gold-plated core wire. 100% Made in Germany.