--- product_id: 210138655 title: "Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth)" brand: "captain o-ring" price: "€ 38.51" currency: EUR in_stock: true reviews_count: 5 category: "Captain O Ring" url: https://www.desertcart.pt/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a store_origin: PT region: Portugal --- # 30% noise reduction 0.4mm travel reduction durable EPDM rubber Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) **Brand:** captain o-ring **Price:** € 38.51 **Availability:** βœ… In Stock ## Summary > πŸ”΅ Quiet the clack, amplify your focus. ## Quick Answers - **What is this?** Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) by captain o-ring - **How much does it cost?** € 38.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a) ## Best For - captain o-ring enthusiasts ## Why This Product - Trusted captain o-ring brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Endurance Engineered:** Premium EPDM rubber resists crackingβ€”lasting the lifetime of your keyboard. - β€’ **Fatigue-Free Workflow:** Shortened key travel reduces finger strain during marathon typing sessions. - β€’ **Complete Pack for Pros:** 135 dampeners plus a microfiber cleaning cloth for a pristine setup. - β€’ **Softer, Quieter Typing:** Experience a 0.4mm travel cut for cushioned keystrokes and 30% less clack. - β€’ **Effortless Installation:** Quick 4-5 minute setup transforms your keyboard with zero hassle. ## Overview Captain O-Ring Blue Keyboard Switch Dampeners deliver a precise 0.4mm travel reduction and up to 30% noise dampening using durable EPDM rubber. Designed for mechanical keyboards, this 135-piece set includes a microfiber cleaning cloth and installs in minutes to reduce finger fatigue and extend keyboard life, making it the go-to upgrade for professionals seeking a quieter, more comfortable typing experience. ## Description These Captain O-Ring keyboard switch dampener o-rings can be quickly installed on the stems of your keyboard keys to prevent keys from bottoming out. Bottoming out occurs when a key is pressed down to its limit, causing the key stem to collide with the switch casing. This results in a loud "clacking" noise while typing that affects virtually every mechanical keyboard. Captain O-Rings's keyboard dampeners provide a shock absorber at the bottom of each key to create a consistent, uniform sound while typing. These dampeners also reduce the travel of keys by 0.4mm, which greatly reduces finger fatigue. Durable EPDM rubber o-rings don't crack like black buna o-rings typically do in this application. To install, simply remove each key, place o-ring around the stem, and replace each key. Installation typically takes 4-5 minutes for the entire keyboard and lasts the life of the keyboard. What to expect: This item includes 135 keyboard o-rings and 1 Captain O-Ring screen cleaning cloth in a resealable zip-top poly bag with "Captain O-Ring" branded packaging. Manufactured and warrantied against defect for one year by Captain O-Ring LLC. "Captain O-Ring" is a registered trademark of Captain O-Ring LLC. Review: Works quite well, within reason. - I am pretty happy with the results of these on my MX Brown keyboards. There were actually enough rings in one package to do my whole Tenkeyless board, as well as most of another Tenkeyless board, but I'm buying another pack to finish that one off as well as put them on my Vortex POK3R 60% board. As others have said, this doesn't completely silence the keys, but it probably does cut down on the noise by about 30%, and adds a different, more pleasant (to me) tone that's less 'clack' and more 'thunk'. When I showed a co-worker (who sometimes complains about how loud my keyboard is) the difference on the keyboard I wasn't able to fully outfit, she agreed that it was quieter, and wasn't able to hear my typing nearly as much from across the room. It does change the feel of typing a little, as there is a little bit of dampening at the end of the keystroke, but I also don't mind that, and in a way it almost makes the keystroke feel more solid to me. I'm also not having issues getting used to any shorter activation, either in gaming or typing. In any case, I am pretty happy with these things and ordered a second set, as I mentioned before. I also like that they included a cleaning cloth, just because it's nice to have them. Review: These are the correct O-rings for Dampener's - I have ordered a bunch of O-rings over the past few weeks to dampen my keycaps, looking for a good set that are the proper thickness and the correct hardness to dampen the sound. These are the ones you want don't buy the cheaper ones in higher quantities, they are too thin and soft to dampen anything. ## Features - 0.4mm travel reduction for a softer landing and better shock absorption - Significantly reduces keyboard sound level - Minimizes finger fatigue by shortening travel and lessening impact - High quality EPDM rubber resists cracking and tearing - Includes 135 O-Rings & Captain O-Ring Screen Cleaning Microfiber Cloth ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B017HJMLDU | | Brand | Captain O-Ring | | Brand Name | Captain O-Ring | | Button Quantity | 135 | | Colour | Blue | | Compatible Devices | PC, Laptop, Mobile Device, Gaming Console | | Connectivity Technology | USB | | Country of Origin | USA | | Customer Reviews | 4.5 out of 5 stars 279 Reviews | | Enclosure Material | Rubber | | Hand Orientation | Ambidextrous | | Item Type Name | keyboard | | Item Weight Unit of Measure | 5 g | | Keyboard Description | Mechanical | | Keyboard Layout | QWERTY | | Manufacturer | Captain O-Ring LLC | | Manufacturer Part Number | BC72657 | | Model Number | BC72657 | | Number of Keys | 135 | | Product Features | mechanical | | Special Feature | mechanical | | Style Name | Blue | | Switch Type | Mechanical | | UPC | 722589526244 | ## Product Details - **Brand:** Captain O-Ring - **Compatible Devices:** PC, Laptop, Mobile Device, Gaming Console - **Connectivity Technology:** USB - **Keyboard Description:** Mechanical - **Special Feature:** mechanical ## Images ![Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) - Image 1](https://m.media-amazon.com/images/I/71QJABh8nWL.jpg) ![Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) - Image 2](https://m.media-amazon.com/images/I/813N8C8diHL.jpg) ![Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) - Image 3](https://m.media-amazon.com/images/I/51RGXXJdIBL.jpg) ![Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) - Image 4](https://m.media-amazon.com/images/I/715KP6EOMBL.jpg) ## Questions & Answers **Q: Does 0.4mm in the specs mean 4 millimeters thick? 0.4 millimeters would be very very thin (i.e. less than half a millimeter).** A: Hello. The 0.4mm is not representative of the size of the o-rings, but rather the reduction in key-stroke travel with these installed. You are correct, the o-rings are thicker than 0.4mm :-). They are actually about 1.75mm thick. **Q: So do you put these on the switch or the keycaps?** A: you put this on the keycap, on the post that is attached to the switch. As it descends into the switch it hits the switch face. Slightly shortens the travels and dampens the impact. **Q: Does it come with a cap remover?** A: Hello, this kit does not include a cap remover. Most keyboard keys can be easily removed from the board with anything flat/thin enough to get under the keys and lift. **Q: Will these work with gateron switches?** A: These should work with any removible mechanical key caps because they are applied to the stem of the key cap, not any part of the switch itself. There are great tutorial videos online if you Google how to apply o rings to key caps. Best of luck! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works quite well, within reason. *by W***I on 4 December 2018* I am pretty happy with the results of these on my MX Brown keyboards. There were actually enough rings in one package to do my whole Tenkeyless board, as well as most of another Tenkeyless board, but I'm buying another pack to finish that one off as well as put them on my Vortex POK3R 60% board. As others have said, this doesn't completely silence the keys, but it probably does cut down on the noise by about 30%, and adds a different, more pleasant (to me) tone that's less 'clack' and more 'thunk'. When I showed a co-worker (who sometimes complains about how loud my keyboard is) the difference on the keyboard I wasn't able to fully outfit, she agreed that it was quieter, and wasn't able to hear my typing nearly as much from across the room. It does change the feel of typing a little, as there is a little bit of dampening at the end of the keystroke, but I also don't mind that, and in a way it almost makes the keystroke feel more solid to me. I'm also not having issues getting used to any shorter activation, either in gaming or typing. In any case, I am pretty happy with these things and ordered a second set, as I mentioned before. I also like that they included a cleaning cloth, just because it's nice to have them. ### ⭐⭐⭐⭐⭐ These are the correct O-rings for Dampener's *by B***2 on 24 April 2023* I have ordered a bunch of O-rings over the past few weeks to dampen my keycaps, looking for a good set that are the proper thickness and the correct hardness to dampen the sound. These are the ones you want don't buy the cheaper ones in higher quantities, they are too thin and soft to dampen anything. ### ⭐⭐⭐⭐ makes a big difference, even on clicky blues *by J***E on 17 September 2021* i was a bit apprehensive after reading some reviews stating that getting o-rings for a keyboard with clicky mx blues was a waste of time, but I tried these anyway. They make a huge difference! My keyboard is by no means silent (or even quiet, really), but it's *far* quieter than it was. The reduced travel is noticeable, so maybe consider the 0.2mm versions if that's a concern. ## Frequently Bought Together - Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm Reduction] (135 pcs w/Screen Cloth) - Captain O-Ring - Rubber Oring Keyboard Switch Dampeners/Sound Reducers Red [40A-L 0.2mm Reduction] (135 pcs w/Screen Cloth) - Keycap Puller Stainless Steel Key Removal Tool Keycaps Remover for Mechanical Keyboard Removing Fixing Tools --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a](https://www.desertcart.pt/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-08-29*