These illustrations were drawn using ZIG Millennium Pens in nib sizes 005, 01, 03, 05 and 08. These pens can be bought in a set of five as well as individually. Rui also used ZIG Cartoonist Mangaka pens in nib size 01. Colours included Black, Sepia, Violet, Grey and Light Blue which can also all be bought separately or in a set.
To see more of Rui's wonderful illustrations please visit his blog here.