Larsen Magnacore Cello C String - Tungsten Wound Steel Core - Medium Gauge C String 4/4 Cello Medium Gauge - This medium gauge string offers a wonderfully sonorous and broad sound with unique ease of playability. It is ideal for cellos with a neutral to bright timbre. Magnacore strings are made on a concentric multi-stranded steel core and wound with high grade Tungsten and precision rolled flat wire. This cello string offers a warm and focused sound, abundantly rich in overtones, with great volume and exceptional string response even when played in pianissimo...right from the start.