Cherry MX Rubber O-Ring Switch Dampeners Blue 40A-R - 0.4mm Reduction (125pcs)

I wasn't sure that the thickness of these dampers (the thickest).At first, I thought I made a mistake about the thickness but when I got used to it, I noticed that I was typing a lot faster than before. In fact, I noticed that the others were typing a lot slower than me. And the sound of the mechanical keyboard is wonderful, no more hammering sound of plastic over plastic when the keys hit the bottom of the mechanism. Just the mechanical click sound from my DasKeyboard Cherry blue keys. Delightful sound and very good physical feeling! It's like hoovering over the keys.For aficionados.

I bought these to install in a CM Quickfire Rapid keyboard with Cherry MX Red switches, and am very pleased with the new feel. Previously bottoming out each key resulted in a loud plastic "whap" noise, but with these rings it's more of a solid "thud" that feels much better. There is no interference with travel other than at the very bottom. Overall the keyboard is -much- quieter. The o-rings seem very durable. It's just a wee bit tedious to install them all, but overall it's not too time-consuming (note: you can't do it without a keycap puller tool). The only tricky part might be the stabilizer supported keys like control, return, and the spacebar, if you haven't done it before. The WASD keyboard folks have a helpful video on their site, under Support->Tutorial->Removing Cherry MX Keycaps, which shows how to remove and reinstall keycaps with stabilizers. The price of this little baggie of tiny blue washers is a bit steep, but they definitely provide a noticeable and qualitative improvement when you type. Comparing these to the red o-rings, which are half the thickness, I would speculate that the red dampeners would convert the "whap" to a "thud" but with a much less cushion-y feel, and you would not notice them as much when you bottomed out. I'm glad I got these, as it makes the keyboard feel more solid, somehow.

I received and installed my dampeners today. Not nearly as hard to install as some indicated in other reviews. They make a significant difference in sound but that also results in a difference in feel. There seems like a significant difference in how quickly the key hit bottom and initially is enough that some characters are not being entered despite a click from the switch. This results in what my wife calls angry typing where I smash the heck out of every key. I am currently attributing this to the fact that they are new and I am ust getting used to them/wearing them in.Am giving a 4 star for now and will increase to 5 later if the missing character thing improves.Update: I have had these on for about a month, maybe longer, and I am very pleased. The missing character thing stopped as I kind of expected it would, and I have really grown to like the shorter key travel. Increased to 5 stars.Edit2:I have had the dampeners on for several months now and they at this point have felt exactly the same after initial wear in period. They continue to not only improve the sound of using my keyboard, they also improve performance from a keyboard I was already more than happy with in the reduced travel path. Do it. Worth every cent and then some

Works well for my cherry MX brown switches. Bottoming out sounds are dampened quite a bit, and the people around me appreciate it!It takes a little bit of patience to remove the keys from the keyboard and putting them in, but it's definitely worth it. Just be mindful to push the rings all the way down (though it will eventually move on its own when you start pressing the keys - I just held the keys down for a few seconds and made sure it was fully on).The travel is noticeable, but not much. Some may prefer a smaller difference, then I think the red may be better though you will compensate for the amount of sound that it absorbs as well.Overall, feels good and reduces noise as stated. I got the WASD keyboard wire keycap puller tool which helped me through the process. Any key removal tool would help I'm sure. But definitely get one as I'm not sure if you can even remove them without any tool, let alone not damage any keys.The 125 pack was enough for full keyboard (even put 3 on space bar, and other larger keys since I had so many left over).

I have had a Filco Ninja Majestouch-2 with Cherry Brown switches for four years now, and it gets a ton of use--I type all day every day. Love the keyboard, but the loud clack of the keys bottoming out was always loud. I don't mind the noise, but every time I had a call, the people on the call would have to listen to me clacking away. I saw these and gave them a try.After installing them, I found it very hard to type. I was so used to the feel of the of the standard keys that the slightly reduced key travel and slightly rubbery bounce at the bottom of the keystroke was very noticeable. On some keys, I had to press harder for the key to be recognized. I thought that maybe the blue rings were too thick, so I ordered the red ones to compare.But after using the keyboard for a few days, the blue rings seem to have been pushed up higher on the key and appear to be much less noticeable in terms of feel and all of the keys operate fine now. When I received the red rings, I put them on the ASDF keys to compare. On my Filco with MX Brown switches, I honestly can't tell the difference between the two when typing normally. Maybe there is some very slight difference, but when typing normally, and even when pressing keys with the red and blue one at a time, I just can't tell the difference in terms of feel or sound. The only slight difference I can find is if I really bang on the keys hard and try and force them to bottom out and hit the base--in that case, there is a very slight clack from the Red ring, but virtually none from Blue.Given this, my advice is:1. Blue vs. Red may be keyboard specific, and they may effectively produce the same results. Unless you try them both, I don't know how you would choose. And in my case, it doesn't really seem to matter which one I use.2. Put the rings on and then use the keyboard for several days to let the rings get pushed into position and to adjust to the new feel of the keys. If you have been using the keyboard a long time, the transition will take longer. If you are new to MX switches, just put them on early and you won't have to adjust as much. There is definitely a difference in feel, but it seems acceptable and I think I'll be able to adjust given the benefits.3. The rings do improve the noise level of the keys. When I remove the ring from a key and press it, I am reminded of the obvious loud clack as the key bottoms out. There is no longer any clack sound with the rings installed, so they definitely work.