Every year Progalvano conceives and creates several custom-made rotor barrels. By starting from the needs expressed by our customers, we often design variations of Rotors that can be easily adapted to similar customers' demands from different markets around the world. So that, thanks to further tests, improvements and standardisations, we can offer our so-called Special Rotor: barrels inspired by our customers and refined by our technical experience, as in a mutual exchange for value.