La Bella stainless steel Jazz Flats® were developed by the best jazz guitarists in the world. Each string is hand wound and polished by our artisans in New York, resulting in a super smooth surface eliminating finger noise and squeaks. Optimized with a high magnetic content for increased electronic output, La Bella Jazz Flats® have a very bright sound and long playing life. We’ve recently improved our string construction to fit more models, and prevent overtones. Stainless Steel Flat Wound Tension: Extra Light String Gauges: .009, .011, .015 .020W, .028, .039 Extra Plain Steel 3rd / G included in each set Wound length of 31.5″ (distance from ball-end to silk) IMPORTANT INSTALLATION INSTRUCTIONS: Install the silk portion of the string inside the tuning post, and then slowly bring the string to tension/pitch. The metal portion of the string can now wrap around the post, as long as the silk-end is first installed inside the tuning hole. Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness