Pilot Custom 845  <B>  18K

Pen point of B of the pilot has a beautiful roundness.  This rounded pen point can be touch the slit to the paper in a wide range of angles.
This means that it brings a comfortable-writing without nib tuning, by having excellent ability to respond to individual differences of angle of writing.
In addition, the line is thick in the same for any direction by this roundness, so you can enjoy a quality of imposing bold.