The pen is simply refilled with ink cartridges and you will get one black ink cartridge and one red ink cartridge when you buy the pen

and compatible with MOLOTOW spray paints and other markers

7 mm rollerball tip

PEFC certified

If you’re looking for a marker that can handle large-scale designs

zig memory systems ms 3400 calligraphy twin tip pen Ink and paint refills The pen is simply refilledA lightfast, acid free calligraphy pen perfect for fine creative writing and creating journals. The Zig Memory system series is archive proof and guarantees that you memories and notes will be preserved also for future generations. The Zig Memory Systems MS 3400 Calligraphy Twin Tip Pen has one 2 mm nib and a a 5 mm nib in the other end.