I've been very happy with the Jinhao fountain pens I have in my pen collection. Working on them and with them I've collected some information that's useful to me and put it in a blog post.
@shuttersparks Is there a good run-down of the various models? It was handy seeing your #5 list but I'm curious about other differences, and Amazon is no help.
@keraba Ah, well, haha, I wasn't writing sales material for Jinhao. Various pen sellers carry Jinhao and you can find an abundance of them on Amazon. Lots of product info there.
As far as I know, they make no piston fillers (unless you count converters.) Their converters work very well also. Never had a problem.
They have a new model, I believe it's the X159 that takes a #8 nib. It can accommodate an international cartridge or standard converter as you'd expect. But it has space inside for an extra large converter that they'll offer for that pen. I guess they'd like to appeal to the TWSBI users like me who enjoy the huge ink capacity.
Other than listings by pen dealers and on Amazon, I don't know of where to get more product info.
Lastly I should mention that the X designation can be important. For example the 159 and X159 are very different pens. So beware of that.
@shuttersparks Hi Phil, I saw Inkquiring Minds' video, which showed a few good body sizes, but do they have other materials? Acrylic or ebonite? Piston feed? thx