DUMP TRUCK 11/06/2017
I use these for slaps and does the job great. Powerful ink formula. HOWEVER!!!!! you need to store these up side down when not in use so the ink can travel better to the tip to avoid streaks. Its a gravity fed marker, that doesnt have a valve pump and the iink barrel is a felt sponge like deal, not like an enoty barrel that we are all accustomed to.  4 of 5 Stars!
helpful?  yes - 2   no - 0 

Question: How do these work with black magic ink as a refill??
Answer:(AP Reply)I/d test little batches first to make sure they are compatible. Black Pilot ink has a very specific recipe for their ink.