Nib type 250 Bock Titanium.
Titanium nib with iridium point.
ABS-feeder/housing diameter #6
Size 6, that means that the feeder is 6 millimeters in diameter.
– Shoulder width: 8.4 – 8.8 mm*
– Overall length: 35.0 mm*
– Recommended ink feeder: Ø 6.0 mm
* The dimensions specified here are guidelines for better orientation and may vary.