GHS Sub-Zero Boomers electric guitar strings are cryogenically treated in a computerized system with liquid nitrogen. The strings are taken down to a temperature below -300 degrees Fahrenheit and are then gradually restored to room temperature. This treatment improves the dimensional stability of GHS Sub Zero Boomers strings, keeping them in tune, while increasing resistance to corrosion. Custom Light gauge: 9-11-16-26-36-46