Light Top / Heavy Bottom strings for sevenstring electric guitar. Cryogenically frozen with a blast of liquid nitrogen, which tighten the molecules, minimizing microscopic gaps. This process removes transient frequencies that produce harsh highs and muddy lows, creating a more consistent string, with true tone and longer life. Precision wound with proprietary alloys specifically developed to deliver fantastic sound, and super-long lasting. Features set of seven strings. String size: .010 / .013 / .017 / .030 / .042 / .052 / .060.