SIRIUS® PB are new models of strings for acoustic guitars. They fundamentally differ from the SIRIUS® series in their metal construction, where the static basis is made up of already standard hexagonally wound steel wires made of the popular Phosphor Bronze alloy.
For wrapping, a technological system of automatic pressure wrapping is used to achieve maximum bonding between the supporting and wrapping wire and to achieve a longer life and sound brilliance of the strings.
The surface of the SIRIUS® PB strings is newly protected by an effective nano film against the negative effects of the alkaline environment and against oxidation, and a completely new generation of strings - OPTISTRINGS with a longer lifespan, while preserving the natural surface properties and pleasant playing of these strings.

All SIRIUS® PB strings are packed in bags made of anti-corrosion foil, which creates a protective inhibitory but non-toxic environment by internal evaporation in the bag and in the boxes with the strings.