16 Pack Rollerball Pens: Our fine point pens with comfortable grips are easy to hold, giving you the best control of your lines. 0.5mm tungsten carbide ball nib writing smooth, high tip hardness, reliable and durable. Large capacity ink for writing length up to 1100m, 3 times longer than ordinary gel pens, non-skip writing distance.High Quality: Our writing pens made of water-based ink. Quick-drying, Non-toxic, acid-free is smear-resistant and fade-resistant, safe and friendly black gel pens for kids and adults. The nib made of tungsten carbide ball, high hardness, silky smooth writing experience, reliable and durable ensures smooth and smudge-free writing.Perfect Design: Each ballpoint pen comes durable metal pen clip portable and anti-drop, through the transparent ink window, you can see the capacity of ink. Avoid the inconvenience when the ink pens is out of ink at critical moments. Front-end regulating system, upper dense and lower sparse structure, make the ink floe steady, prevent broken ink and ink leakage to achieve smooth writing.Wide Application: black pens perfect for writing sketching, drawing, painting, illustration, design, signature, manga, comic, signing, sketchbook, paint, coloring books and bullet journal. This black gel pens an necessary supplies in school, home and office, also is great gift for girls, teacher and students.Purchase Without Risk: Each of our liquid ink rollerball pens is rigorously inspected before leaving the factory to ensure flawlessness and you can rest assured to buy.