Dr. THOMASTIK ÇELLO TELİ SPIROCORE MEDIUM SET. Thomastik-Infeld Spirocore cello strings feature a core that has greater elasticity than that of conventional strings, which means less inertia and a greater propensity for musical vibration.The sound is full and homogenous, balanced and voluminous. The string has been calibrated to satisfy the express wish of many artists for a string that is equally effective for arco and pizzicato playing styles.Thomastik-Infeld has tackled notorious cello problems such as wolf notes and muting difficulties with Spirocore C and G strings in wound tungsten and silver.Spirocore''s hi-tech core makes for effortless fingering, responsive bowing, stable tuning, and a very long string life. With Spirocore the steel string''s technical possibilities have been developed to their maximum.