Shuttle Art Retractable Pastel Shifting Gel Ink Pens, 15-Count Black, Or Home. 15 SHIFTING BARRELS: 5 types of shifting color barrels, totally 15 pack, give you more fun in daily life and make you feel relaxed. These gel ink pens are suitable for school, office and home. Ideal for writing, journaling, note-taking, underlying, sketching and more. BLACK INK: Shuttle Art 15 pack 0.5mm retractable shifting gel pens are all with black ink. Those pens are acid-free, non-toxic and conform to ASTM-D4236, which will meet your demands of daily writing, marking and signing. A perfect choice for your everyday use. SMOOTH WRITING QUICK DRYING: The optimized fine point with premium ink delivers skip-free glides all the time. High quality ink dries quickly, so there will be no smearing or smudging during writing. PREMIUM DESIGN: Soft barrel is comfortable for you to hold. Durable clip makes it convenient to carry with. And each pen is sealed with wax to prevent ink from drying. Just feel free to enjoy the fun of writing. SERVICE GUARANTEE: Your satisfaction is our top priority, please rest assured to purchase our products. If you are not satisfied with our products or have any questions, please feel free to contact us at any time.