Koh-I-Noor Rapidograph Artist Pen & Ink Set, 7 Assorted Pen Nibs, .75 oz. Bottle of Ultradraw Black Ink, 1 Set Each features a pen that handles like a pencil, moving in all directions without snagging or digging into the drawing surface. Versatile technical pen for engraver's perfection, loose sketching style or a finely detailed pointillist technique. Color-coded nibs sizes included: .13mm, .18mm, .25mm, .30mm, .35mm, .50mm, .60mm. Included bottle of Koh-I-Noor TransMix Ink is a versatile, waterproof drawing ink. Made in USA.