PILOTG2 Gel Ink Refills, Bold Point 1 mm, Blue, Pack of 2

Especially useful if you use fine point pens.

just what I wanted

Longevity Was dried up when. I opened the package.

These G2 gel cartridge refills fit a large number of pens (I use mine with one of the more expensive Watermans that looks similar to the  WATERMAN Expert Rollerball Pen, Fine Point, Black Lacquer with Gold Trim (S0951680) ), and as crazy as it might sound, these $2 refills really do outperform some of the most expensive brands on the market, some of which are six times the price. The ink flow is smooth, but doesn't run, drying is fast, and smearing has never been an issue for me. It does indeed sound strange to put such an inexpensive cartridge in such an expensive pen (my Waterman cost me well over $100 when I purchased it ten years ago, and is now pushing $200 in today's market), but I've had experience with the very expensive European cartridges, and this Japanese Pilot refill really does beat them on most every count. Its the perfect marriage between the gorgeous quality and feel of the Watermans, which are still made in France, and a cartridge that performs to the level we would want to expect from such a nice pen. You can get them in multiple colors, and in four levels of line thickness, so make sure you select carefully using the selection tool before adding it to your cart. I've used both the blue and the black colors, plus the thick and medium thicknesses, and have been happy with all of them. This is a such an incredibly good deal for such an incredibly well performing product that giving it five stars seems like selling it short. Highly recommended.

Love the refill just a pain to get it

The amount of ink is lots. These pens last a long time.

Love the glide of the roller ball, when writing cards to loved ones.

The red pen refill works great.

These refills are required for my Dr. Grip pen. They are easy to install and are smooth writing on most surfaces. This is a reorder.

Funcionan de maravilla, lástima que su portaminas no tanto, al usarlo en un cuerpo de bolígrafo normal, éste se rompe fácilmente de la cuerda que permite cambiar el cartucho, así que debo comprar otro bolígrafo para usar los repuestos. Pero éstos sí funcionan y lo hacen muy bien. Es un azul intenso, nada que ver con otras marcas.

This refill is as good as said, highly recommended for all lovers of writing instruments

I used this refill for a Waterman Perspective rollerball pen. The fit is perfect and the writing quality is on par if not better than the Waterman official refills.-Delivery was prompt and much earlier than the expected delivery time considering I'm in England and the seller is in the US.-I ordered the black variant. It is a smooth, fast and easy to write with ink.-It has been used with a variety of papers including Moleskine, Black n' Red, printer paper and shiny catalogues.-I recommend both the product and the seller.

The ultrafine 0.38 is the best writing gel pen available, smooth, crisp writing and works on virtually any paper. The refill lasts a very long time with extensive use. Works exactly as advertised. Great pen, superb refill. I liked the cross compatibility as well -- this fits in the 0.5 and 0.7 mm pens too.