Online double-sided pen ink cartridges, universal pen refills, compatible with all common fountain pens, even Lamy pens - 5 spare cartridges - colour red, 17307/12

Very good, perfect thickness. Be careful when putting in. Needs to be done gently. My first one opened on both sides and leaked all over.

even the narrow end wont fit into my Cross fountain pen. probably narrow enough (just) but not quite long enough. I'll either need to return or just bear the cost - they are not expensive

The cartridges themselves are great - they fit both my Lamy fountain pens and my non-branded ones (happy days). Nice strong colour ink too. The only downside to these cartridges is that the ink seems to bleed, even on really thick, good quality paper. Not sure if I will be buying any more

I’ve been buying these for the last three years for use in my Parker. So regularly that I have a subscribe and save order. It’s the only pen I write with and I am writing for literally six hours a day. Just went on to order an extra pack as stocking up my bag before the Easter school holidays and saw it said on the product description’not suitable for Parker’. I reckon on my normal levels of at least one a week I’ve gone through just over 150 of these. The colour is rich (I’m not a purple person but it is part of my job requirement that I have to write in purple), I have never even had to flush out or wash my pen in that time (I know, this possibly makes me a bad pen mummy) - I just ‘pop’ and go!! Ignore what they say - theses cartridges are fab and work perfectly well in a Parker with no damage or leaks!!!

I bought these as Lamy cartridges seemed expensive. The ink ia good black, i cant see any difference in quality and i can use the cartridges for my other pens. Good kit.

Have to be careful. To much pressure opens both ends.

Versatile cartridges to fit standard cartridge or Lamy pens. Not quite as rich a black as I'd like but good.

As advertised