Since 1975, GHS Guitar Boomers™ have been the power string and continue to set the standard for musicians in nearly every genre of music. Nickel-plated steel wound over a round core brings a bright tone with a powerful attack that lasts for an extended period of time. Each string is individually sealed in the GHS Nitro-Pack envelope with our anti-corrosion guarantee, ensuring they're as fresh as the day we wound them at our factory.