Thomastik 154ST Mandolin Precision Set - Stark GaugeMANDOLIN MANDOLIN The strings are flat wound on chrome steel and highly polished except the plain E string, which is made of tin plated silver steel. They have a steel core made of special alloy with high elasticity and durability. The sound of the mandolin strings is clear and brilliant. All strings are easy in handling and have a long life span. PRZISION MANDOLIN vibrating string length 34 cm light medium heavy kg lbs kg lbs kg lbs 150 e2 mi2 I