and even tattoo artists use these for sketching on skin before needle work

7 mm uses a thicker

Molotow Refill Extension A rings fits: All markers of the Molotow 100 series

visible ink window

a load of interesting background info is waiting in the texts of Georg Bakunin

pilot v board master small refill Risk and even tattoo artists useThis is the replacement ink cell for the Pilot V Board Master S whiteboard marker. It twists into the marker barrel in place of an empty cartridge, so the same marker body can keep being used instead of being thrown away and replaced. The capsule is clear, so you can check how much ink is left before it runs out mid task. Specifications Type: liquid ink dry erase refill cell Compatibility: Pilot V Board Master S marker only Available colors: Black,