Aurora's Colored Premium Electric Guitar Strings are company´s innovative way of providing all guitarists a better option when choosing their strings. While the color ‘wrap’ delivers smooth play and an all around better sound, it also extends the life of the string. You get to truly play outside the lines! The premium strings are infused with silver, and they last at least twice as long as plain strings, making them a good value. These Strings are made in USA. Gauges: 12 | 15 | 24 | 32 | 42 | 52. Colour: Silver