The Stabilo Boss pens have a fast-drying

like most other shoe polish markers

There are two ways to use it: rub the clear tip against a colored Koi pen's tip for a second or two to pick up some pigment

blendable by touching tips or with a wet brush

on the run otr 004 soultip empty squeeze marker 12 mm Rois The Stabilo Boss pens haveOne of our favourites! Empty OTR. 004 squeeze marker from On The Run, that is made from flexible plastic, so you can get a nice flow in your lines. The transparency of it makes it easy to see both which colour and how much is left in the pen. Equipped with a durable 10 mm tip, that can be changed when needed. Check out all markers and inks from On The Run here.