Peer Reviews
The Equilateral Pen
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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.
Carbon Neutral Shipping & Operations
Compostable Packaging
| Material | Metal Body |
| Pen Type | Capped Roller Ball .7mm |
| Ink | Refillable cartridges sold separately (.5 or .7mm) |
| Presentation | Single pen with felt case |
| Length | 5 3/8" | 13.6 cm |
| Origin | Designed in Oregon Imported |
USA
Flat Rate $7.95
Orders $40+ ship for free
Expedited service available
International
Shipping is available to most countries. See details at checkout.
If you're shipping to Europe, Asia, the Middle East, or Oceania, please check out our European website for lower shipping rates and quicker delivery times.
Frequently Asked Questions
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When your order arrives, open it up and take a look. If anything isn't as expected, got damaged in transit, or doesn't fit properly, let us know and we'll make it right.
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Shipping is available to most countries. Simply select your country at checkout.
Shipping FAQIf you're shipping to Europe, please check out our EU website for lower shipping rates and quicker delivery times.
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We do our best to process and pack up orders within 1-2 business days. You will know your order has shipped when you receive tracking
information. Typically orders arrive within 1-8 days (depending on where you live) expedited shipping options are available at checkout. -
No problem! We offer full and partial refunds and exchanges. Read more here.
Further Research
Let customers speak for us
The colors are so vibrant!
This was one of the first designs I saw that I immediately knew I wanted, and I really love the vintage illustration/diagram style and the colors of the design. It's really detailed and the quality of the notebook itself is super sturdy. I also appreciated the care of the packaging. Thank you!
Super!
It looks great and it holds a lot of coffee too. The perfect combo. Makes a nice conversation piece as well. I really like hand carved texture as well.
Had to grab a sticker to show support. Printed very nice and I love the shine on it. Thank you!
Savannah
Cognitive Surplus Triangle Sticker
I usually don't buy pens online, but I thought this one was too cool to pass up. The gold ink is a super cool feature, and it pairs very well with the black paper notebook I bought!
Savannah
Photon Metallic Gel Pen (Single)
These gel pens are super vibrant and glide across the pages effortlessly. They really pop with the black paper notebooks. I was torn on which pack to get because all the colors offered are so cool, but the supernova ones caught my eye the most!
Savannah
Supernova Gel Pens (Pack of 10)
I love this notebook! The print on the front is gorgeous and the black pages are such a cool feature. It's nice and lightweight and I will be using this for notes. Thank you!
Beautiful paper
High quality beautiful paper. Fast shipping.
Carolyn S.L.
Norse Runes Wrapping Paper
Wonderful paper!
You guys! I love this paper so, so much. I use this kind of paper frequently in my studio, for book binding. I was excited to see your prints and I have made a number of wonderful books for my next few sales events, including one at an art gallery in Portland. I can’t wait to see how the science nerds of the world react, haha.
I’ve purchased quite a few patterns so far and I will definitely be ordering more as I use them.
Keep up the nice work!
Kristi
Neat Art Studio
Netarts, Oregon
Kristi D.H.
Wrapping Paper Mystery 6-Pack
Better Than Imagined
This is no ‘average’ notebook … the cover is like walking into Einstein’s lab with cool equations floating in front of your eyes! Not only is it intriguing - the notebook itself is far from just ‘writing paper’ - it actually a piece of art - sitting on my desktop, with its black paper … is an awesome addition to my world!
Equations that Changed the World Softcover Notebook - Dot Grid
Feels good to write on
David
Chemistry Notepads
Feels high quality. Looking forward to using it!
Norse Runes Wrapping Paper
This paper is perfect for use in a series of Coptic bound books I’m creating. What a great find for use in book arts!
Lovely!
Excellent Notebook
Very happy with the quality and the design exactly what I wanted
