Excellent writing ink! Excellent Seller! Fast Shipping! Excellent price! Thank-you! Happy Holidays!!

Producto tal y como anunciado, perfecto para mi boligrafo.

Received these refills quickly and they fit just fine in my twist-to-extend pens. The springs in my pens are still in good shape so not a problem having refills without the spring. I use one of the pens to write checks and have found the performance great so far in terms of line thickness, smooth flow and non-smear. It was good to be able to find refills at a reasonable price especially since it's near impossible anymore to find refills in stores.

Great refill for a pen until it wasn’t. Second cartridge exploded in the pen but the pen was taken on flights so maybe it was the pressure? Not sure!

That's a "perfect" refill for my pen. When I bought this pen, it came with black ink, and I hate black ink. The pen manufacturer does not provide blue refills, so I was really happy to find this product. It works for the most part, but sometimes the cartridge fails and leaks ink, specially in very hot weather. As long as don't forget the pen inside the car on a hot day, or keep in in my pocket when I am outside for too long, it will be all right. Other than that it is a great product.

I’ve been searching for refills for the Tiffany ballpoint for ages. Finally found these!

Clearly not cross inserts and I knew that when I bought them. They work well but don’t last long and they tend to come unscrewed often but for the price I can deal with it. They do right smooth and cleanly.

Very good quality. great value. Works well with my pen. Delivery was prompt.