1947 L Type: Roundwound Material: Chrome-plated Gauge: 012/016/024/032/044/054 Specifically developed for jazz guitars, these strings are handcrafted in Germany and feature a traditional colored silk winding at the ball end. Your jazz guitar will love these strings. Decades of development work and close collaboration with many renowned jazz musicians have led to the creation of the JAZZ SWING series. The best materials are used here to ensure optimal sound quality.