OPTIMA CHROME STRINGS are impressive with fast and stable intonation, great durability, and are perfect for the highest quality instruments. ;Special alloy of the wound wire for optimal tone pick up. Crisp sound and very good playability. 100% Made in Germany.;12-string E-guitar chrome;2 x .010, 2 x .013, .020w, .009, .028w, .012, .037w, .017, .045w, .026w;Ehemals Optima 3110, new name 4028.12RL;