LONG SEGMENT
The 2200 SP or 2204 SP hones have long metal or galvanic expandable segments to improve or even correct the straightness of a bore.
2 DIFFERENT DIAMETERS
The 3200 or 3204 hones have metal or galvanic expandable segments with 2 different diameters.
These rotors hones allow a concentricity within one micron between the two diameters.