A classic Jumbo Marker by Pilot is a favorite among artists and graffiti writers alike. It's its ultra fat square chisel nib makes it the perfect marker of choice for any surface, sketchbook or black book. The Pilot Black ink is widely considered the best coversall industrial permanent ink in the world. Coupled with a perfectly rigid but forgiving flowey nib and you have a marker of the highest quality.
The D30's and friends leave their mark on the South Side of Chicago.