The Plumix a modern “art” pen, meant for calligraphy rather than casual writing; it has no pocket clip, and the extended tail on the thing would keep it out of a pocket anyway. It’s an interesting design exercise– those little yellow tabs, apart from putting one in mind of squids, act to prevent the pen from rolling off a table when it’s set down, which is a very good idea indeed. The pen is set up to allow the cartridge to be changed without having the cap off, which avoids mess. Unlike many other calligraphy pens, there’s a size indicator on the section so you if you’ve got a set, you don’t have to take the caps off to find the one you’re looking for.
If you have come here looking for information on the Pluminix, you’re sort of in the right place; this pen is just somewhat longer than the one with the longer name.
Production Run: I should just remove this heading for Pilot pens; this is a mystery, and if you can solve it I’d be grateful to hear from you.
Cost When New: $28.35 MSRP on the Pilot US website, spring of 2013, but that’s for a package containing three pens.
Size: 14.8 cm long capped, 15.2 cm posted, 14.5 cm uncapped.
Filler: Cartridge, and here’s a funny thing. I’ve got, by a convoluted path, a European model, which is rigged to take international pattern cartridges. Ones bought elsewhere take a proprietary Pilot cartridge.
If you are relying on the preceding information to win a bet or impress a teacher, you should read the site’s scholarly caveat. Remember, this is the internet, and it’s full of bad information.