Set of 9 - the pigment pens come with various nib sizes, include 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.8 mm and 1.0 mm brush tip, can satisfy your various needs Good Quality - the black pens are smooth, non-toxic, waterproof and acid-free, will not smear, fade, bleed or skip, also they are lightweight and comfortable to hold Convenient to Use - with the cap of each pen, you can keep them neatly organized so that you don't need to worry about smudging yourself, with nice black ink, they can come out smoothly and dry quickly Suitable Occasions - the waterproof fine liner pens are suitable for architecture, ultra-fine liner, writing, engineering, detail space, drawing and more Good Gifts - fit for professional technical writing and drawing for teachers, artists, writers, illustrators, students, allow you to write clean lines for your everyday use Specifications Color: Black ink Material: archival acid-free ink Pen tips 9 sizes: 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, Brush Pen handle size: 14 x 1 cm/ 5.5 x 0.39in What's in the Package 9 x Fineliner pens (9 different nib sizes) Note Please draw with an even pressure to avoid bleeding. Keep the tip perpendicular to the paper in order to draw lines with the same thickness. After use, make sure you recap the pens to prevent them from drying out. Children under 3 years old must be accompanied to use by adults