Gauges 12-16-25w-32-42-53.
These are the very same phosphor bronze strings that come on Gibson's famous J-200 Jumbo acoustic guitar. They have an excellent ringing attack and presence, and will give your guitar a responsive voice that cuts through, thanks to the special phosphor bronze alloy. Vacuum sealed for freshness.
All Gibson strings are bench tested and builder approved to bring the best sound possible out of your instrument.