Gas Pressure Refill SPR1 Blue Medium - Refill for Space Pen Ballpoint Pen, Writes Reliably in Any Position

You know what, it's just a pen ink; but when this turned up in the post, I was in the middle of a pretty terrible Friday at work. So I'd just like to say thanks very much to "M" for the note on the invoice. It really made my day and restored some faith in humanity. Product wise, I've been writing with Fisher Space Pens for over 25 years. Genuinely a super impressive product which features pressurised ink meaning you can write at all sorts of angles and the pen will continue to write. Haven't had the chance to test it in space but can confirm, they've always worked for me over grease and even underwater/over wet surfaces. Comes with a handy adapter to fix most parker pens too.

Really good, writes on anything

I was really looking for a fine point black refill, but at this price it was worth the change to blue/medium. I've had my Space Ben for a long time and this is the first time I've had to refill it, so I look forward to seeing how long this one lasts. The refill comes with a small extended plastic cap to convert it for use as a Parker-style refill. I know that the Parker design refill is used in many pens, but it did not fit in my daily-use Parker Jotter as it was slightly too wide, so if anyone is intending to use this in an actual Parker pen, be aware that it may not fit. Otherwise, good product, good price, good delivery time.

It is a refill for a Fisher Space Pen I have had for a long time. It's perfect!

I like the Space Pens, as they can write on virtually any surface, and can even work upside down. This is great when lying in bed doing a puzzle. I had an old parker pen that needed new ink, so opted for this to replace the standard one. Great choice, as I have the nice exterior, and a great ink inside.

Excellent quality n cost

As we like to read papers and then do crosswords, sudukos, killers etc in bed - a pen that writes upside down is essential. These convert any decent pen into a space pen!

Got the pen as a gift for a relative a few years ago and when it ran out of she kept the pen, she liked it so much. Since that day I made it my sole mission...My purpose yo make sure her pen will always have ink! THIS IS MY DESTINY! ...ok 5*