24 Pieces Replaceable Ballpoint Pen Refills Smooth Writing 4.5 Inch (11.6 cm) and 1 mm Medium Tip (Black and Blue)

These biro refills are an excellent replacement especially with a choice of blue or black, they are really very good value for money. I would recommend this product.

Good quality product. Quick delivery. Well packaged.

These are good although I’ve only used one so far, it didn’t quite fit my pen but I expected it wouldn’t because it’s an odd nice and it was a present from India, I just put a bit of paper inside and it fits ok and means I can still use the pen.

Used in my Macmillan ballpoints (the cancer charity's very good quality products) as a replacement for the original and these work to the same high quality. A particular benefit is that they operate when used away from the perpendicular. This is useful when lazing around in bed with a crossword!

Great value for how many cartridges there are and work great

I bought these because I’d purchased what I call the perfect pens, but the cartridges were faulty in that they skipped and sounded scratchy..so I ordered refills and they fit my ISOUL pens perfectly, the fact they come in blue and black gave me an option and these refills write very smoothly! I’m so pleased! I also was able to replace my empty cartridges in my hand made wooden pen and one other...thank you..

Ink runs out quickly and does not write smoothly. Good price for a lot of cartridges when in a pinch

They fit, they write. Arrived in good time, job done.