[u407]’s 3D printed Signspinner was created as a clean/dirty indicator for a dishwasher, and at its heart is a mechanism that works a lot like that of a retractable ballpoint pen. Every click of ...

Save money and reduce waste by reusing and refilling your retractable pen with Pilot G2 refills (sold separately); The vibrant, quick drying ink helps prevent smudges and smears Power to the Pen ...