Schmidt K5 Push In Deluxe Fountain Pen Ink Converter (Pack of 2)

Works well with kaweco perkeo no issues, premium feel and packaging. Bit expensive thogh, but no other alternatives found period.

Have good build quality and fits well. Price is high.

Perfect fit for Amazon basics pen. Never liked cartridges. This converter will give me more freedom to choose the ink color that I want. Fill it up and it will hold slightly more ink than the cartridge the pen came with. This is a screw type converter and not a plunger which I am not a fan of. One converter cost almost as much as the pen though, even when you buy them as a pair. Also remember this is just an ink container. Just by getting one of these, if you are looking to find a magical improvement in your pen, then this is not what you would want to buy. The performance of the pen depends on the nib quality, the ink delivery from the nib, the quality of the ink, the paper you are using and of course the way you write. Definitely satisfied.

Bought it for my Pelikan Twist pen. Functioning is perfect. It's a little loose in the socket, but that's because Pelikan's "standard" refill size is a little wider than what other brands use. Still, perfectly usable.

I suppose it is a design issue, the ink stops following after sometime. To get it working again you need to turn the cartridge screw a little. Now we cannot do that every day ...

It fits snugly in to Pelikon, Kaweco and other Chinese Fountain Pens German perfection is visible. Ink could be filled without any air bubbles. Writing smoothly from the filling till the inks is exhausted. Air travel safe.

I bought this this to fit into the Amazonbasics fountain pen and it fits (and works) like a charm. I am not sure how well it fits into other pens though as I haven't tried. There's also little 'behind-the-piston' fluid accumulation from when you are washing it between changing inks (a problem I have faced with the Parker syringe types).

This is the push in, not the screw in type Schmidt converter. Fits into Muji aluminum fountain pens. The one that I'm using also does not have any dry up issues. Moderate capacity, the same as standard international.

Works as expected

Fast delivery.. Fit in my muji perfectly.. Thx seller

Have had issues with other brands. These work and perform flawlessly. Operation is smooth in both directions. I have ordered several for use in multiple pens and for spares. (Also have the #6 (screw in, for pens that use them)) no problems). A visible silver coil inside the ink chamber of others is a warning flag. That coil inhibits complete emptying of the ink (for cleaning) and reduces the amount of ink that can be drawn in. The only thing I can see that it DOES do, ( based on the examination of a converter that was received defective ) it prevents the shaft from dropping out of knob when the plunger reaches the nozzle which would make it impossible fill the tank (bad design/engineering).

Bought these for my Stadtler fountain pen and they fit perfectly. Thanks.

These work just as advertsed