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B100 Rollerball Pen


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Pentel's B100 rollerball is an icon of Japanese industrial design and a pioneer in its category. Introduced in 1972, the B100 was the world's first water-based pen. In a market that was dominated by oil-based, viscous ballpoints with metal ball tips, the B100 had few precedents.

The B100 design is defined by two features that were groundbreaking at the time of its release: its free-flowing, saturated ink and its resin ball tip. The ink makes satisfying, dark marks in three colors, and the resin tip is slightly flexible, so you can actually vary the line width by changing your hand pressure. This makes the B100 an unusually responsive writer, even in today's pen market.

Because the resin tip depends on softness in the writing surface to work smoothly, we recommend using the B100 in a notebook or on a stack of paper, not with a single document on a hard surface. If there isn't enough flexibility in the surface, the ball is pushed too hard into the pen, leading to skips and scratches. But if you simply put some extra sheets behind your writing surface, you'll really see this pen shine.

Unchanged since its release 50 years ago and still popular today, the B100 is a great, inexpensive pen for any desk. Sold individually; please select your color from the drop-down menu. Made in Japan.



We ship all orders from our store in St. Louis, Missouri. 95% of orders are processed in 1-2 business days. Shipping to the United States is always free for orders over $59. For orders under $59, domestic shipping rates start at $4.50. You can calculate your shipping cost in the cart or at checkout. For St. Louis residents, we also offer free curbside pickup. Just select "Pick Up" on the first page of checkout.


If there's a problem with your order, please contact our customer service team at If your order is damaged or defective, we will send you a prepaid return label and replace the item immediately. If you change your mind about an order, you can ship it back to us in new condition for a refund or exchange. However, if there is no error on our part, we cannot refund shipping charges or pay for return shipping. The deadline for all returns is 30 days from the delivery date. All clearance items, dated calendars and planners, and grab bags are non-refundable.

You can read more about our policies and procedures here.


We are an independent retailer trusted by artists since 2015, and our expert staff are happy to help you with any questions you might have about our products and services. We love helping our customers choose colors, build gift packages for friends, and get started with new tools and materials. We can also take special orders for items not listed on this site.


(314) 884-8345
10 AM to 5 PM Central Time,
Monday through Friday

B100 Rollerball Pen

B100 Rollerball Pen