Uni-ball Emott

Uni Emott fineliner. 
The superfine tip is durable and resistant to splitting or bending, so the 0.4mm line width stays constant. Water-resistant, fadeproof ink that's also feather-resistant.
Stylish, minimalist barrel design: matt white finish with a 15mm band denoting ink colour. 7mm square profile, secure cap that posts easily onto the end of the pen.