Bullet journalese: you'll love Le Pen! Its smooth, micro-fine plastic nib (0.3 mm) allows for precise accuracy, making this one of the best pens for bullet journalling. It's perfect for filling out important forms, scrapbooking, writing letters, or for use in academic planners. The ink is water-based, smudge-proof, acid-free and non-toxic. Conforms to ASTM D4236.