Schneider Topball 850 Refill in Euro-Format for Ink Roller Pen 0.5 mm Red Pack of 10

It's perfect for my needs.

Love these refills and the price. My favorite rollerball refill, I think it's smoother than the Schmidt 5888 and dramatically better than the MonteVerde stuff you can get at Staples/Office Max.

Great refills, write smooth and easy. Now I can keep using what has become my favorite pen

work fine

Very smooth, red color is bright.

Not as smooth as the other colors purchased. Expensive for what it is.

I bought (for a conference I was organizing) 150 fairly expensive pens, which came equipped with Schneider Topball 850 05 cartridges. The result was a disaster, since the handwriting was not fluid at all, as the ink was probably semi-dry. In order to rescue the pens that were left over after the conference I had to replace all the cartridges with refills from a better brand. Stay away from this product.