Gel cartridge for the Drehgriffel pen from the Leuchtturm1917 brand.

The gel ink in Drehgriffel cartridges has a much higher viscosity than standard pen ink. This is a unique advantage for flawless and smooth handwriting. The pen refill made in Japan with a line thickness of only 0.5 mm creates an exceptionally delicate writing with a clear contour. Even with a slight stroke, the ink flows very evenly onto the paper. This is due to the ceramic ball bearing which ensures perfect ink flow in the tip.

Flow Black refills for the Leuchtturm1917 Drehgriffel ballpoint pen available in packs of 2 refills. 

Document proof ink ISO 12757-2. 

Available in both Broad and Medium tip.

To replace the ballpoint refill unscrew the turning head.