Uni-ball ONE F Gel Pen

By Uni Mitsubishi. 

These sleek rollerball pens have a black gel ink line (in either 0.38mm or 0.5mm). The ink is quick drying and fade resistant. 

They have a retractable nib, a metal clip, and come in a gorgeous range of barrel colours. 

They are 14cm long, and the grip is about 1cm wide. 

All pens have black ink.