This sets includes 10 pens in vibrant colors that come in a convenient plastic case. The case folds out into a fun stand-up easel making it easier to choose pens and keep them organized. With their sturdy bullet tips and brilliant, intense colors, Pen 68 fiber tip pens are perfect for layout, detail and sketching. The odorless water-based ink will not bleed. It also will not dissolve toner or ink of permanent markers. Pens can be left without their cap for 24 hours without drying out. Colors include azure, black, blue, brown, carmine, dark blue, dark gray, dark ochre, dark red, earth green, green, ice green, leaf green, light cold gray, lilac, rose, turquoise blue, ultramarine, violet, and yellow.