Von York ® Cryogenic series Electric Guitar Strings Von York Electric Guitar Strings are manufactured in the USA and meticulously placed in a controlled cryogenic chamber, which is first treated with ultra cold nitrogen gas. The Result: The string is more stable and does not experience as great a degree of change in its overall tension as it is stretched during tuning and playing. This helps the string hold its pitch. The stability induced by our cryogenic treatment can actually increase the life of the string by reducing the amount of stretching during normal use, thus preserving its elasticity. No sacrifice in tone and consistent intonation. In other words, you sound awesome no matter what! When you want the best, accept nothing less than Von York. Shredders Delight! Kelvinite® Electric Guitar Strings, 09-12-17-26-38-58 Hybrid for that Metal Edge you have been looking for!