) is a very smooth writer and puts down a nice dark line, it feels very fountain-pen-esque, and even allows a little bit of personality in the writing, however, the ink in the refill is *NOT* bulletproof, it can withstand alcohol and Xylene, but washes clean with exposure to plain o...
The side-knock pen uses a D1 refill, which is widely available. It's the same type Rotring uses on theil multi pens. If you're planning to get one, I highly recommend the Uni Jetstream D1 refills, very smooth writing and very good black color (if you want black ink that is). ...