Cognitive Surplus The Equilateral Pen* Metal Pens & Pencils | Pens

There’s something beautiful about the 60 degree angles of an equilateral triangle. Here’s a metal pen that’s ready for your most elegant proofs, thoughts, or musings. With a cap that snaps on with a satisfying click, take your notes to the next level with the Equilateral. 

Each pen comes in its own felt case. 

Refill it with our special .7 mm or .5 mm ink cartridges.