Ruler Cap Prototype

Designed as a handy accessory for Pen 1, this Ruler Cap snaps right on and doubles as a measuring tool on the go. One side features a 10 cm scale, while the other gives you inches; perfect for quick sketches or spontaneous ideas.

This cap is currently in its prototype stage, so you might notice small imperfections. We’re still fine-tuning it, but it’s fully functional and made with care!