This works exactly as advertised, however the writing angle must be very steep for it to write correctly

Second refill is in perfect working order, however it does NOT properly fit my Boker Plus tactical pen

Works well for him working in construction, says it writes on anything he needs it to.

As expected works just like a fisher lol

Works great, a little snug in the zebra F-701, but works extremely well for writing

Product works great though, can't know the function/performance.

The Space pen refill works excellent.

Love this pen refill works great

These work perfect in Parker Jotter pens (they come with an adapter)

The ink works great, as well as the original ink.

Your cheap-o fine point can be difficult to write with (can be like writing with a needle

Your cheap-o fine point can be difficult to write with (can be like writing with a needle