I use the M66 refill in my Lamy Imporium rollerball. Writes a fluid line and lasts for lots of writing. Price is good; especially if you buy several refills at once,
It writes smoothly and does its job well. I had one before where it didn't write all that well. Fortunately, I got a good one now. Appelboom has a great service, delivery was fast and the communication was good as well.
M66 refill fits my Lamy Imporium rollerball pen well. Looks to contain a good amount of ink. Available in broad and medium tip. I have the blue B and black M refills. They came in single foil packets which should hold them fresh for good shelf life.
I have a Lamy swift that I have had for long time. I love fountain pens as my mainstay writing instruments, but sometimes the paper will not allow it. Forms are a good example, or perhaps envelopes for regular business mail. For these tasks I use my Swift. The M66 refills are about as smooth as you can buy with respect to roller ball refills. Some gel pens may rival the smoothness of the M66, but they cannot match the longevity of the M66 refills. I have gone through countless M66 refills in all three colors and they are all great writing refills.
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