This marker has a 0.3-3 mm chisel nib so you can create different line widths. It is a great option for precision drawing, sketching or drafting. The Uni Super Ink is permanent, fade proof and waterproof. It has a pocket clip on the lid so you can easily take it on the go. The super tough tip will ensure this liner can withstand pressure and last a long time. The window cap displays the nib width for easy identification. This liner has smooth black ink.