Captain O-Ring - Rubber Oring Keyboard Switch Dampeners/Sound Reducers Red [40A-L 0.2mm Reduction] (135 pcs w/Screen Cloth)

I ordered these to reduce the noise from my Cloud 9 keyboard. There were enough in the bag and they do make a difference. The noise has been noticably reduced.

Did its job. Do not listen to reviews that talk about how it doesn't quiet blue or green switches. You can't expect an o ring to quiet the loudest switch made. This is designed to keep the key from bottoming out. It does that. Don't put more than 1. This also does nothing. Get a thicker o-ring.Great product and quality.

Just like me, you're probably wondering what these are, what they do, and do they really work. And even if they do, how well do they work? I bought both the red and blues from this business to try and test them out. I have not tried the slightly more expensive WASD ones yet so I cannot compare it to that brand.First off, the reds are supposed to be thinner then the blues. When I received them I actually notice that they're also wider too, strangely. I don't think this is an issue, however, as it seems to be working fine. It's only noticeable during installation because the reds are a lot easier to slide into the keys than the blue ones are because they're wider.In terms of real world performance, I installed both the red and blues on multiple keyboards: Cherry MX Browns, Cherry MX Blues, and Cherry MX Reds. Then I tried gaming and multiple type tests online with them to see what feels best for gaming and typing.I've decided the color band matches best with the Cherry MX colors: blue with my MX Blue Keyboard and red with my MX Red keyboard. I don't have any on the MX Browns because I like them the way it is and it feels weird with any of the rings installed. The red rings doesn't help reduce noise in my opinion. It's only shortens the key presses by a very small margin that is barely noticeable from the start, but is slightly more noticeable after prolong usage. I don't like them on the MX Blues because it doesn't help reduce the clicking at all and the travel is negligible. I prefer them on the MX Reds because I feel the MX Red have a lot of wasted key travel that the red rings will help improve performance and response time. At the same time, the MX Reds aren't that loud so the red rings will be perfect for it.Now with the blues, they're much more noticeable and effective at reducing the noise. On my MX Blue keyboard, it reduced the noise, on average, over 10-15dB each key I measured. It makes the MX Blues sound so much more smooth and quiet. The reduction in key travel with the blue rings are very apparent and noticeable as well. It improved my typing time by 10wpm on average because it reduces the delay between button presses. It doesn't take a lot of force to activate a key on the MX Blue keyboard and when you're typing fast, you end up pressing each button pretty hard, pressing the button all the way down. The blues rings reduce the wasted time of the extra key travel after you press the button so you can move on to the next letter. All the while greatly reducing the noise.Another thing I realize is when I use the blue rings with the MX Red keyboard, I often miss when I play game or type. It seems the reds don't have a good activation feedback so I'm always unsure if I've actually pressed the button enough. Sometimes I feel like the blues are too thick for the reds as it needs to be pressed down more, I'm not sure.Overall I like blue rings more than the reds and would definitely get them again for all my MX blue keyboards.

Not worthy.Reduces noise a bit while sacrificing typing accuracy and speed (sometimes you will feel like you pressed a key, but didn't so you will have to go back a press again).This O-rings don't reduce travel distance which in most mechanical keyboards is way too much (say, red switches with 4.0mm total of travel distance). This rings or any other similar rings will cause keys to be lifted from keyboard base, while keeping the travel distance, but sacrificing precision because some keys will feel wobbly (this worsens if you use two rings per key, as some suggested in forums).At the end I gave up and removed this rings. Obviously had to go through all keys, but that was better than sacrificing accuracy and speed.Although not directly related, having a travel distance of 4.0mm on some keyboards seems like a burden, so if you type all day you may want to consider newer options with less distance (sadly, one way to find a keyboard that fits is through trial and error). Not a trial at the store, but a trial of several weeks to really find what fits.Up to this day I continue to use mechanic (and laptop like keyboards) without rings.

They're O-rings - can't complain. They shorten the travel distance of the keys but I still feel plenty of travel. My MX Brown Quickfire Rapid-i is quiet enough for my roommates now

This product was exactly as described, I had enough to put an o-ring on every key on a corsair k100. This includes putting 3 on large keys like the shift and space bar and had some leftover. I am tempted to get the thicker rings as these still have some travel, but they retain the satisfactory typing we look for in mechanical keyboards.

I bought these because A) I wanted to try out O rings for the first time B) these were amazon prime shipping and C) there were no reviews. I just recently got into mechanical keyboards and bought a Rantopad MXX with Gateron blue switches. While I love the keyboard, while playing BF4 I started to get complaints on noise volume.These greatly reduce the "clacking" sound of bottoming out (which I kinda liked) but since they're only .2 mm doesn't signifigantly alter the way the switch felt. I was also worried about bottoming out not feeling as "crisp" but I'm happy to say that that's not the case. I'd say, it still feels good, but just, different. Not mushy like a rubber dome, yet not harsh as it was before. I would definitely recommend these to anyone who uses blues as you still get that great audible click without all the racket, or anyone with a mechanical keyboard in general who wants to reduce the noise without significantly altering the feel of their keyboard. A+ product!