1.0 mm ball with a 0.5 mm line per manufacturer specifications.
Pack includes 12 pens. Color-Blue,Copper,Golden,Green,Lime,Marine,Pink,Purple,Red,Rose,Silver,Sky
A roller ball pen that is easy and comfortable to write with,
Archival quality ink that is chemically stable, waterproof, and fade resistant
No smears, feathers, or bleed-through on most papers