The Equilateral Pen DNA Let the archaeopteryx emblazoned on

Let the archaeopteryx emblazoned on the cover inspire you to find other missing links that shed light on our planet's history

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The Equilateral Pen DNA Let the archaeopteryx emblazoned onThere'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.