Caran d'Ache Varius Rubracer Silver Fountain Pen Nib width:Oblique such as black

such as black

illustrated by Leonardo da Vinci

They both feature four machined cam lobes properly rotated to match the first four lobes (opposite the timing gear) on popular cubic inch sized motors

so below…

so you can write with your flex nib all day without having to refill

Caran d'Ache Varius Rubracer Silver Fountain Pen Nib width:Oblique such as blackIntense. Dominant. Determined. Its body of black rubber with guillochage decoration gives the Varius Rubracer an imposing elegance that is perfectly in tune with contemporary urban life. The cap, with its delicate guillochage and its new jointed clip, conceals a new larger nib. Rhodium coated silvered trims. Fountain pen nibs in 18 carat gold, rhodium coated available in seven different widths (size BB on demand). Piston ink pump or Caran d'Ache ink