Airc 12/13/2020
This marker is f*cking badass. Its inky, makes solid lines, and I love the design of it. 10/10  5 of 5 Stars!
helpful?  yes - 0   no - 0 

Trav D 12/01/2015
ay AP, NEVER EVERRR stop sellin these markers! Theyre Amazingng! 11-10 stars  5 of 5 Stars!
helpful?  yes - 0   no - 0 

Ma.destruction 11/30/2013
This is the best black valve marker ever made, even better than the Burner in my opinion. The ink flow is ridiculous, I haven't had it streak AT ALL yet. Even on metal surfaces where the paint is somewhat rough and faded, it still glides on super smooth without even the slightest hint of a streak. This is the Holy Grail of all 15-20mm valve markers. I would give this a higher rating than 5 stars if it were possible.  5 of 5 Stars!
helpful?  yes - 3   no - 0 

Question: also if i cant afford tyo buy the refill bottle of speedflow, what is somthing cheap i can use to refill it
Answer:(AP Reply)You can use Pilot.

Question: yo i seen some vids of GR when he says that this sh*t fades real quick. how long do u think itll take to fadse in direct 90 degree sunlight
Answer:(AP Reply)We are in Seattle, we don/t get enough sun to run this experiment.

Question: Beside the nib, what are the differences between this and the Burner? I was hoping this one might have an even better flow.
Answer:(AP Reply)The Speedflow has great flow and Burner Black ink are going to be really similar.
 (Trav d Says:) The speedflow is way betterThe speedflow is way better