Zebra Sarasa R 0.5mm Retractable Gel Pen Set - 4 Colors (Black, Blue, Red Ink) with Sticky Notes - Smooth Writing Japanese Pens for Office, School & Journaling

These pens have a very nice feel in the hand. They're easy to grip, have a great click mechanism, and a white - making them easy to see when laid alongside other pens. The ink has a nice, vibrant color. If you're looking for a rollerball gel pen in a 0.5mm size these will work fine. I just wish they were available in 0.7mm size.