L: 4.3" 109mm, 0.5 mm Tip, Compatible Rollerball Pen Refills Compatible with Waterman #S0112670 / 540951/54090 Ballpen, German Ink, (Blue 2PCS)

I was surprised when I got this in it actually fit in the pen. It works perfectly. It has great flow.

I was disappointed with the quality of the CaoDuRen Rollerball refill I received yesterday. The rollerball was scratchy, and the tip was so thin I am reluctant to press down for fear of bending it. I should have known better, a Waterman pen worth $100 and a refill that doesn't have the quality of a Bic.

I’m using them but prefer medium. Still looking. That said, these seem to work very well.

Needed a new refill for my Parker pen and these came quick and fit perfect.

Writes poorly. Ink flows unevenly. Gravely feel. Won’t buy again.

Works fine

I chose this refill set due to the fact that they are listed as "medium" point tips - not FINE point tips.However, they are not 0.7mm tips - thus false advertising. They work fine, they fit my Watermen pen very well - but they are not as advertised.I was looking for MEDIUM point replacement cartridges - they do not exist at Staples, Office Depot, etc. And as a result of this purchase - they do not exist on Amazon either. Be aware!!!

I tried two different pens and they write horribly. It is not possible to write a single sentence without being mad. Not smooth. Worst quality ever.