G2 Gel Ink Pen Refills,Quick Drying Smooth Ink for Gel Pens, 0.5mm 0.7mm Fine Point Writing Office Supplies,Pack of 10 (0.5mm Red)

Though I usually use a thicker gel ink pen refill, I immediately grabbed these since the Pilot G2 refills are some of the more well known brands so it's kind of a one sized fits all pen refill. I have them as backup if I don't need something super bold.

Not g2 refills but Parker style refills. I kept them since I can use them in other pens.

The refills worked but were built different and would not retract properly.