3 Pack Black SPR4 Refills for Bullet

Good price. These are a relatively niche product I think so not much to compare them to. They do seem to write on nearly all surfaces. Would recommend for use in every day carry pen.

If this is your question: -You: 'Will this refill fit in my Space Pen?' I'll save you some time: -Me: 'Yes, yes it will' The SPR4 fits in ANY Space Pen with the exception of one: The Q4; The Q4 is the multi-ink Space Pen that has red ink, black ink and a pencil. So if your space pen writes in only one colour and hasn't been hiding a pencil lead for the time you've been using it, this is the refill for you (assuming you want black ink, in a medium gauge). I'm not a Space Pen geek, the following is the sum of experience of using the product daily and about 5 minutes of research. These are genuine Space Pen pressurised refills with black ink. They have a medium-sized ball in the tip - this ball is 1.1mm in circumference (and made of tungsten carbide). The first of these refills actually writes slightly better than the one that came with my Space Pen, giving a more comfortable 'glide' over paper and plastic. It writes well on a range of surfaces and at any orientation, allowing you to use a vertical wall to lean on if you need to. Not being an astronaut, I can't tell you if it writes in space :( Some basic information about Space Pen refills that you may find useful: SPR1 - Blue Medium SPR1F - Blue Fine (0.9mm) SPR1B - Blue Bold (1.3mm) SPR2 - Red medium SPR2F - Red fine SPR3 - Green Medium SPR3F - Green Fine SPR4 - Black Medium SPR4F - Black Fine SPR4B - Black Bold refills available in one size*: SPR5 - Burgundy, SPR6 - Purple, SPR8 - Brown, SPR9 - Turquoise, SPRSL - Silver (*I don't know why there isn't an SPR7.)

I used to use a Cross pen but found it hard to get refills. This is a great replacement if you want to use something more reliable and better quality than a regular plastic disposable pen. Also there are no leaks.

Not as easy to write with as previous purchases. Writes at all angles, but needs to be fairly square to the paper to write smoothly. Not had that problem before with Fisher refills. Update - we gave up on that first refill of the pack of three and threw it away - the other two are good.

I order these either 3 or 6 at a time which lasts nearly a year. Fisher space refills are a little bit niche as they are waterproof and guaranteed to write, as I write all day everyday and the nature of what I write it is absolutely essential that I have a quality working pen.

Do what they're supposed to do. A 3 pack makes sense.

these are the real ones to buy

If you like this ink or need it in your pen this is three of them. For anyone who has not used the ink this is harder to get out of the pen than "normal" ink, but it is a quality product and not having to care what angle you write in is comfortable for me.