Linbsunne Gel Pens Black Ink Pens for Office 0.5mm Fine Point Pens Smooth Writing Retractable Work Pen (12-count)

https://www.amazon.com/Linbsunne-Office-Writing-Retractable-12-count/dp/B0CWL52CV6?th=1 Fairly generic Chinese pen. All kinds of body types, grips, colors, etc. but they all seem to use the same .5mm ink refill that everybody loves. Find the pen body you like and you can even buy the refills in bulk right there on Amazon.