Korpa 
Gauges 10-14-23-30-39-47.
Martin MSP3600 Studio Performance 12-String Bronze Wound Extra Light Acoustic Guitar Strings are made with a unique composition that gives brilliance, clarity, and longevity of sound. Bronze winding is ideally suited for strings that have deep, rich basses and clear, bright trebles.
Martin acoustic guitar strings are high quality strings intended for daily use. Martin Strings are wound to precise specifications. Core and wrap wires must meet strict requirements.
- Bronze alloy for brilliance and long life
- Great price
- Studio-quality performance