I use a pencil graduation 6B, kneaded eraser, Brazilian acrylic inks (nankim), A3 paper professional quality comic art board, disposable ink pen 1.0, and a brush.
People have asked me about the brushes I use to ink. The one format I do like is a round liner (Fine Liner Sable 2/0 302). There are many formats but particularly I like that one because it is perfect for contouring, outlining and for doing fine details.
This is a Kolinsky sable-hair brush, a very fine artist’s brush. The hair is obtained from the tail of the kolinsky, a species of weasel rather than an actual sable. Artist's who use the kolinsky sable brush claim it has superior strength, slenderness, and resiliency when compared with other sable brushes. But guys these brushes are expansive so to tell you the truth, I can get the same result inking with a brush made of Ox-ear hair, they are thin, long and resistant, and it work just fine for me!