Jargar Strings For Cello A "Special" I; Medium - have a special, flexible steel core. Single string / Violoncello 4/4 a-1 Medium 0,76mmSteel/Chrome steel wound0,01mm thicker than A-string ClassicThe JargarCello SPECIALstrings are built on the long tradition of the Classic A and D strings but they are more powerful than the Classic A string and D string. The secret is in the bigger thickness of the strings which give themmore power, volume and brilliance and make them the perfect choice forsolo playing,chamber musicas well as orchestra playing. All Jagar cello strings - A, D, G, C