Kuretake Zig Letter Pen CocoIro Pen Refill - Brush Type - Black

Bought this pen to practice chinese calligraphy, and I'm pretty disappointed. The pen writes very wet, causing the ink to feather and bleed on cheaper paper, or take a small eternity to dry on higher quality paper. The brush part is made of synthetic fiber and holds its shape surprisingly while still giving lots of nice variation. Unfortunately, it's also super thin and really really hard to control. I'll probably end up buying on the normal fine/extra fine refills next time.