Stainless Steel Flat Wound Tension: Custom Medium String Gauges: .012, .016, .024W, .032, .042, .052 Wound length of 36 (distance from ball-end to silk); only the silk portion should wrap around the tuning post or else you run the risk of breaking the string Made in the USA with American Wire Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness"