Black Gel Pens Refills, 12 Pack Retractable Gel Ink Pen Refills Bulk, Fine Point 0.5mm Tip Smooth Writing Quick Dry Gel Pen Refills for Journaling Writing School Office Supplies (12 Black)

Took pictures of my regular rose gold metal barrel S gel pen next to the copper metal barrel S gel pen. The refills fit perfectly in my rose gold pen! The refills also fit in the copper pen, but the tip is a little shorter than expected.

Works great on my Sumikogurashi pens! I loved how they wrote and despaired when the ink ran out. Now my pens have a longer life and I'm not tossing out entire pens, just their cartridge!

Love these pens

This was actually the greatest thing I ever bought. I kept getting these amazing pins that I love but I kept throwing them away every time the ink ran out and just bought more pens. Now I don't have to do that. The riding quality is amazing. The gel is not runny. I don't have to frequently buy pens anymore. There's no leakage. They fit perfectly into the pins that I buy which are called Mr.Pen so if you're one of those people that like the design or color of your PIN and you don't want to throw it away, these are perfect refill for them instead of just buying new pens

just right, refill for a pen my wife loved, I took a gamble having never ordered refills, but these not only fit her pen, but I was able to shorten one and it worked in an old pen I had been holding on to because it was my favorite during those check writing days of long ago.

They are great refills for my pens

These refills are PERFECT for the UIXJODO Gel Pens I ordered a while back. That seller did not make refills available for their product and just said to try and find a generic one. Fortunately I discovered these blue ones made by Linfanc and they work really well. So glad I took a chance and ordered these. Plus they come in a 12 pack. Very nice indeed. Highly recommended. Great value for the money and a quality ink. Well worth the investment.

These fit the UIXJODO pens but the writing quality is not smooth at all :( usable, but not the butter smooth writing experience of the original pen refill