Dr. THOMASTIK KEMAN TELİ INFELD BLUE SET. Thomastik Infeld telleri, iki forma sahiptir: Red (Kırmızı) ve Blue (Mavi). Red formu daha sıcak ton karakteristiği sunarken, Blue formu daha parlak ses vermektedir. Infeld serisi, Dominant ve Pirastro Tonica gibi benzer sentetik merkeze sahiptir. Somewhat of a revolution in thinking as far as design is concerned, these strings help to create a "custom set" feel more than other generic prepackaged sets. Wound first with a natural alloy found in nature, and then again with more conventional alloys these strings are suitable for old and new instruments, are stable, and settle in quickly. Lower tensions produce a more free and full sound. The blue produce a more free and brilliant tone.