Thickness and colour
Thickness of lead, HB, 0.7mm
Thickness of lead, 0.5mm.
Flow Medium, ceramic ball with a diameter of 1.0 mm and a line width of 0.6 mm.
Flow Bold, ceramic ball with a diameter of 1.2 mm and a line width of 0.8 mm.
The line width varies depending on the pressure applied to the writing instrument.
Colours: black and royal blue