Spirocore cello strings are a further technical development of Thomastik-Infeld’s Künstler Seil series and have a flexible spiral steel core. This core has greater elasticity than that of conventional strings which means less inertia and a higher propensity to musical vibration. The sound of these hi-tech, top grade, spiral steel core strings is full, homogenous, balanced, and voluminous. These strings have been calibrated to satisfy the express wish of many artists for an equally effective arco and pizzicato. Spirocore’s hi-tech core makes for effortless fingering, responsive bowing, stable tuning, and a very long string life. These are among the most popular cello strings available. Individual Spirocore cello strings are available in different gauges. G and C strings are also available with silver or tungsten windings. This is a Thomastik-Infeld Spirocore 4/4 Cello Full String Set A String: Medium Gauge – Chromesteel Winding – Flexible Spiral Steel Core – Ball End D String: Medium Gauge – Chromesteel Winding – Flexible Spiral Steel Core – Ball End G String: Medium Gauge – Chromesteel Winding – Flexible Spiral Steel Core – Ball End C String: Medium Gauge – Chromesteel Winding – Flexible Spiral Steel Core – Ball End