SchneiderOne Change Rollerball Cartridges - Blue - Pack of 5

Excellent refills as they write so smoothly & last well. I write a lot in work & fhey seem good value. Bought one for my cllleague as she was so impressed with the pen & refills. Like the fact that you can also store a spare refill in the barrel.

I really like these there very simple to use, you just unscrew the pen empty out the old cartridge and add in one of your chosen color I found black, blue, purple ect. You remove the plastic cap from the top of the pen nib screw the pen pack together and of you go ready to write what ever you're doing doing from a shopping list, to paperwork, journaling or writing a manuscript.It's cartridges are not very expensive and they last a good long while too. I would recommend them, I find them alot better to use in comparison to parker fountain pen ink cartridges.

Not a bad ink to be writing with…only problem is I’m a nurse and one cartridge didn’t see me through 2 shifts. And you have to have second cartridge in the barrel to support the one you’re using otherwise it doesn’t work at all. Bit of a daft design. I’d pay a bit more to have one long cartridge

They don't last long.