Standard tipping:

Iridium alloy — fitted across our full EF–B range

Value tipping:

Tungsten carbide — used on school and entry-tier pens

EF — Extra Fine:

0.4–0.5mm

F — Fine:

0.5–0.6mm

M — Medium:

0.6–0.8mm

B — Broad:

0.9–1.1mm

BB — Double Broad:

1.1mm and above

0.7mm:

Entry calligraphy

1.1mm:

Light italic contrast

1.5mm:

Standard calligraphy stub

1.9mm:

Pronounced line variation

2.3mm:

Bold calligraphy, display lettering

2.5mm:

Maximum stub width, poster and display work

Shoulder width:

6.8–9.0mm, depending on nib size *

Breather hole:

0.4–0.6mm *

Slit length:

6–9mm *

Tipping ball diameter:

0.3mm (EF) to 1.0mm+ (BB) *