Versum Cello GThomastik Versum cello strings are among the warmest produced by Thomastik, and their sweetness is not without clarity and distinction. As the first choice of many notable professionals, Versum strings are capable of producing subtle and complex tone colors to match the cellist's advanced musicality. The Versum C and G strings have a spiral core and tungsten chrome windings. Vibrating string length is 70mm 27. 6"