PITT Artist Pens combine all the advantages of artis's inks with the benefits of a modern disposable pen. These sets feature a variety of pens specifically selected for hand lettering but they are also ideal for sketches, drawings, layouts, fashion design and illustration. The pens offer odorless, permanent, acid-free, PH neutral, waterproof and lightfast inks. Each set includes brush nib pens that applly smooth strokes of ink for a painterly style. The durable brush nib allows for brush strokes from broad to narrow widths with an even application of color ideal for hand lettering and illustration. The 4-Pen Wallet Set contains three black pens in super-fine (.3mm), medium (.7mm) and 1.5mm nibs as well as one dark red brush pen. The 6-Pen Wallet Set I contains brush pens in light yellow glaze, pink madder lake, light pthalo green and light cobalt turquoise and two super-fine (.3mm) pens in cobalt green and black. The 6-Pen Wallet Set II contains brush pens in May green, leaf green, permanent green olive and dark red and two super-fine (.3mm) pens in May green and black. The 8-Pen Starter Wallet Set contains brush pens in cold gray IV, cold gray I, warm gray III, warm gray V and black, a 1.5mm nib pen, a super-fine (.3mm) nib pen in black, a Castell 9000 pencil in B hardness, a metal single hole sharpener and a handy lettering guide.