OASO K016 Retractable Fountain Pen Set 0.5mm with 4pcs Blue Ink Cartridges Smooth Writing for School Students (Deep Sea Black)

The K016 was an amazing surprise for me. Being a fan of retractable fountain pens, I ordered this pen with little expectation, especially at this price point. This has got to be one of the best values in the fountain pen world. Being aimed at the student market, it’s plastic. The plastic is dense and sturdy. It does not look or feel cheap, however. The knock action isn’t silent but it’s relatively smooth. The way this pen seals is quite innovative. The opening on the section has a rubbery circular membrane with a slit. The nib emerges through the slit and retracts back inside. The seal is very effective and the nib hasn’t run dry. This pen has written first stroke, every stroke. This pen is ready to jump into action with a fast click, and off you go, with a smooth nib, for quick notes or long writing sessions in comfort. Four ink cartridges of ink are included, and one empty. The empty cartridge is for filling with your choice of bottled ink, or ink sample vials. Easiest way to fill is with a syringe or pipete. They are very sturdy and will refill many times. You cannot use a converter. Simply fill their cartridge with a blunt syringe. Reverse writing works very well. It’s a light pen, weighing 14g inked. Highly recommended and lots of fun. I’ll be gettIng more colors.

If you like a fountain pen but are looking for something more contemporary, this is your pen. It was no problem to insert the ink cartridge and once it was in, I pushed the top button and a fountain pen nib came out, and it was easy to use. Looks like a regular pen with a longer button on the end to extend the point. I would recommend it to anyone that appreciates a fountain pen. The value was great for the price paid. The pen seems to be well constructed and will last long. The nib goes into a holder and did not leak any ink out when closed, so I wouldn't hesitate to carry it in a shirt pocket. The nib is a fine point and wrote smoothly.

I was really suprised by this pen and figured I was throwing my money away when buying it but I was totally wrong. I bought another click-top cheap fountain pen but it had a plastic cap that still needed to be put on otherwise it would dry out and/or leak. This pen doesn't need a cap and fully retracts into the pen. It has a nice weight to it. Despite being plastic it is significantly weightier and sturdier then my other cheap fountain pen. The construction of it feels nice and the click-top is nice, not to light or firm. I like the fine tip and it writes really cleanly. I have no issues with leaking or smears and the ink doesn't bleed on cheap paper. My other fountain pens have a habit of leaking so I am really pleased not to have ink-stained fingers. I did have trouble getting the ink flowing at first and had to squeeze the ink cartage once I had it put in to get it started then put the top half back on. Since then it's worked great. I had it dry out because I forgot to click it and retract the nib so I had to redo the trick of squeezing the cartridge to get it flowing again, but that was totally user error. It was left open for over an hour, it isn't drying out if I leave it open for minutes at a time. I like the grip, I find it comfortable to write with. I just wish it came with black ink instead of blue. I am going to buy their black ink when I am done with this cartridge.

If I could give this zero stars I would. It felt great in my hand, but it never did write properly, with virtually no ink flow. It skipped terribly while writing.

This pen is very light weight. It's definitely a jolt if you're switching from a standard fountain pen with a solid metallic build. This pen is very clearly plastic and weighs like it. That said, the shape, size, design, and execution are great. Surprisingly so. This very fine point (the sharpest I now own) works with flowing cursive or my all caps daily penmanship equally well. The ink flow is smooth, but has a slight scratch due to the fineness of the point. The click mechanism has a pretty long travel distance but that means that the hooded nib is completely covered, and the actuation feels sturdy and nice. The grip is also very comfortable. Anyone who likes thicker bodied pens will appreciate this one. There's enough girth with 2 shallow sculpted sections for grips that fit nicely in the hand. The only big oddity I found was that is comes preloaded with an entirely empty cartridge for some reason. There's no converter, just the empty refill. It comes with 4 refills in the package which are also nice, but that part threw me a bit. Also, the silver sticker is annoying and doesn't peel off well.

For such an affordable fountain pen, it is a sweet, buttery smooth writer. I have not been able to put it down. It is light weight, yet feels substantial in built. I also love the retro vibe of the style and color. I bought the dark and light green body. Would love a cream and burnt orange combo. Will look to see if there are other colors. Would be great for an affordable gift set as well for any level fountain pen user and/or to introduce someone to the hobby.

I purchased this to try out a retractable fountain pen before possibly spending the money on a much more expensive one, like a Pilot Vanishing Point. While there is obviously no comparison between the quality of the two, I wasn't sure if I'd like a retractable fountain pen. The OASO pen is nice quality, especially for the price. The click of the button feels satisfying, the nib wrote well right out of the box, the plastic doesn't feel like the cheapest of the cheap. Most importantly, it doesn't seem like it will dry out too quickly after not using it for a while. I cleaned out an included cartridge and filled it with Diamine - Onyx Black and threw this pen in my purse as an EDC pen. After not using it for a few weeks, it started writing immediately. Overall, if you want a retractable fountain pen but don't want to splurge on an expensive one, give this one a try.