advantage: 1.tiny tolerance between segments for good roller balance 2.perfect curving to fit the core 3.sharp, long lifespan

advantage:1.tiny tolerance between segments for good roller balance2.perfect curving to fit the core3.sharp, long lifespan

More segments for rollers as below:-

for machines:

inner box

diamond segment for calibrating roller with 5 right spirals applied to Pedrini machine