Buna O-Ring, 50A Durometer, Round, Black

I purchased this to modify my Cooler Master Quickfire Storm mechanical keyboard. The keyboard features Cherry MX blue keys, which make a clicky sound when depressed 2 mm. That click is not a problem, but if you push them down the full 4 mm, there is an additional clack that is quite loud and the abrupt stop is also a bit jarring to the hands. The right solution is to purchase O rings like this and install them on the bottom of every keytop. The 3/16" interior dimension version is what's wanted.This is a pack of 125, which is perfect for a keyboard (you will have a few left over). They fit snugly and easily and had the desired effect: the bottoming out feels softer, is far quieter, and is less jarring on the hands. It also decreases the travel of the key. The difference is not huge, but it is noticeable to me. I also tried putting two of these on the bottom of some of the keys because I would like a really short travel keyboard. The result was an even softer, shorter travel stroke, but if you didn't hit it hard it didn't activate, so I had to remove them. You can really only use one of these per key.I would be interested in thicker (same ID but larger OD) versions of these, and also the softer 40A hardness, which is very popular among keyboard modders. They are hard to find, though. The material is fine for the purpose (I don't think the pink stuff would be better in any meaningful way).Anyway This is by far the cheapest and most convenient source of keyboard-modifying O rings that I have found, so I suggest them to anyone with a mechanical keyboard based on Cherry MX switches (which is almost all of them). Excellent product and price.Thanks!

Pros:Quieter key pressing (keys no longer bottom out)Great price! I can't believe these were less than $10... Mech master race!less distance to press (until botton out, trigger distance is the same of course)more than enough for every kew on my tenkeyless. got to give some out as samples.maybe just in my head, but they seem to bounce back quicker making keystrokes almost effortless.Cons:Smell a little weirdkind of tedious to install (not product specific, applies to ALL O-Rings)My brother said they make the keys feel too much like rubber domes. I disagree but I can see what he means. If you possible can, try before you buy!Takes about as much getting used to as switching from RD to Mech (1/2 hour of typing and it feels like home)Protip, I use a mechanical pencil to install these. If you pull of the eraser, the hole is the perfect size to press them down (take the lead out 1st!) and then I used the writing end (still no lead) to make sure it was nested right. Honestly you could just roll them on and press them down firmly and they will be fine, but I feel like that may leave them a little twisted... I don't know. I don't mind spending the extra 5-10 minutes since it's a 1 time installation for my pride and joy.

I used these to prevent the clack noise on my mechanical (Ducky Zero) keyboard which has Cherry MX Blue switches when the keys bottom out. They worked perfectly for this and were so much cheaper than the colored type O-Rings sold for this exact purpose.Now I hear the nice click sound when the key is actuated but no longer hear the clack which occurs when the keys are pressed too hard causing the plastic of the key to strike the plastic of keyboard. These fit perfectly under each key and perfectly dampen the clack by preventing the striking of plastic to plastic. It's a very simple modification to make to your mechanical keyboard making the clicking sounds more consistent.What I mean by making the clicks more consistent is, under normal circumstances on a mechanical keyboard when you press the key with just the right amount of force you hear the audible click designed to notify you that a character has been registered by the system. Sometimes however you might apply too much force not only activating the intended click sound but also a secondary clack sound caused by the key bottoming out, plastic to plastic contact. That only happens when too much force is used making the different sounds inconsistent overall.So by adding these O-Rings onto the shaft under each key this no longer occurs. If too much force is used the key never strikes the bottom harshly because the rubber is there to absorb the shock and prevent the noise. So you end up only hearing the intended click sounds, not the unpredictable clacks along with the clicks.That is what I meant, when you add these to your mechanical keyboard you get a more consistent (pleasant, for some people, lol...) sound level of clicks, no added clacks.Also there is a trick I read online that helped me add these more easily. You take apart a click type pen, and after you press the O-Ring onto the bottom of the key using your thumb to get it started...then use the barrel of the pen to press the O-Ring the rest of the way down the shaft of each key bottom. It was very simple for me doing it this way and I wanted to share that with you.There's no reason to overpay for specialty type O-Rings when these are quality O-rings and work perfectly for this purpose. I am so glad I purchased these and did the mod to my keyboard. I love the way it sounds and feels now much better than it did before. I had also ordered the 70A Durometer Black type O-Rings at the same time to compare since they were under $2.You can feel the 70A ones are a little more stiff and not as flexible (But they also worked fine) I couldn't really hear or feel a difference between the softer 50A and the firmer 70A O-Rings. Both were quieter and less jarring compared to no O-Rings acting as a buffer between the 2 plastic surfaces.Also, I tried adding (2) O-Rings under each key as a test and it is possible to do with these black O-Rings as they aren't too thick to do this if for some reason you also wish to modify the keys travel length.So using 2 rings on the shaft still allows the key to come down far enough to make the mechanical click and work properly but also limits the key from going down much further than that. Some have said online that it increases typing speed by limiting the distance the fingers travel when touch typing but I can't say if that is true or not. So after the test, I removed the second set of O-Rings and just left one O-Ring per key on my keyboard which limits the bottoming out but not so much the travel length.I personally prefer it this way with just one O-Ring under each key.I hope my review has helped you decide whether or not these work well for your mechanical keyboard mod project and hopefully also saved you some money.Have fun with your keyboard Mod!Good luck!

Purchased these to soften some of the noise for my Blackwidow mechanical keyboard. Possibly to my own lack of knowledge on the subject, I was disappointed that they did not dampen as much noise as I would've liked. Also, since my keyboard is backlit, I didn't think to expect the black o-rings to block out some of the LED's lights. Whoops. Going to have to get some clear ones next, and hope they dampen more of the noise than these did. The review score is more for the dampening noise than my mistake of getting black ones. I've seen plenty of videos on installing o-rings and I know it is possible to get ones that make your keycaps quieter than these did. Otherwise, they've done their job well enough and were easy to apply.