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Inka Pen

This product is no longer available, but don't go just yet.


  • Break-it-down design and metal ring let you carry it with keys or attached to clothes, pack or journal; O-ring secures pen inside its watertight case
  • Quickly reassembles as a full-size pen
  • Pressurized ink cartridge ensures the pen will write wet or dry at any angle, any temperature and any altitude; replacement ink cartridges available
  • Also features an integrated PDA stylus
  • Fabricated from high-strength stainless steel and carbon fiber
  • Measures 3.125" by 0.375" in diameter (closed)
  • Makes a great gift for the outdoor adventurer in your life; pen contains blue ink


REI membership


Best Use Casual
Length (Closed) 3.125/(open) 5 inches

The REI Difference

100% satisfaction guaranteed

We stand behind everything we sell. If you are not satisfied with your REI purchase, you can return it for a replacement or refund within one year of purchase.

REI's guarantee doesn't cover ordinary wear and tear or damage caused by improper use or accidents.

If your item has a manufacturing defect in its materials or workmanship, you can return it at any time. See our limited warranty.

Gear & advice you can trust

At REI, we live and breathe the outdoors, and we're passionate about sharing our expertise with people of all skill levels. Whether you're new to the outdoors or a seasoned explorer, we'll take the time to understand your needs and help you find the right gear for you.

10% annual member refund

Anyone can shop at REI, but for a one-time $20 fee you can become an REI member and enjoy a lifetime of benefits. These include an annual member refund, typically 10% back on eligible purchases.*




*10% is typical but not guaranteed. Your refund is based on eligible purchases, which exclude REI gift cards, services, fees, REI Adventures trips,, and discounted items. Learn more