White gel pens are designed for drawing, lettering and design work on tinted paper. They are ideal for adding details to a picture, creating highlights, placing accents, including in watercolors and sketching with markers. The Sonnet set includes 3 gel pens with writing nib of the most popular Size 0.5, 0.8 and 1.0 mm. The varying pen body thickness allows creation of both fine, even and more expressive lines. It is recommended that the pens be stored in a horizontal position with cap on.