Martin Acoustic Guitar Strings (MSP4200) Description Martin MSP4200 Phosphor Bronze Medium Acoustic Guitar Strings use a winding alloy that is ideally suited for making strings that deliver deep, rich basses and clear, bright trebles. Martin strings are high-quality strings designed for daily use. Core and wrap wires must meet strict requirements to make the grade. Martin acoustic guitar strings are wound to precise specifications. Features: Fantastic quality strings One complete set of strings Medium gauge (.013 - .056) Phosphor bronze wound Made in Mexico Product Details: Brand: MARTIN String Gauge: Medium Color: Bronze Instrument: Acoustic Guitar String Material Type: Phosphor Bronze Item Weight: 1.6 ounces Product Dimensions: 4.72 x 5.91 x 4.72 inches Item model number: MSP4200 Is Discontinued By Manufacturer: No Date First Available: January 12, 2006 Color Name: Bronze String Gauge: Medium String Material: Phosphor Bronze Number of Strings: 6 Size: 1 PACK