Martin M160 Silverplated Classic Guitar Strings High Tension Ball End Gauges 28-32-40-30-35-43. Martin M160 Silverplated Ball End High Tension Classic Guitar Strings are high-quality strings designed for daily use. Ball end. Silverplated winding resists corrosion has a longer life, is easier on the fingers, and has a clear tone. Martin classic guitar strings are wound to precise specifications. Core and wrap wires must meet strict requirements to make the grade.