Belcanto Gold Cello String, D - medium - 4/4 from Thomastik-Infeld.
Belcanto cello strings were designed to produce a modern sound. The strings have excellent response and stay in tune very easily.
The A and D strings have a steel core while the G and C strings have a rope core. The C string also has a tungsten layer for increased volume.
There are two sets available: Belcanto, which is a bright, clear, optimal balanced sounding set, and Belcanto Gold, which is transparent, rich and warm in timbre.
Belcanto Gold strings are 100% nickel-free and therefore suitable for players with nickel allergies.