--- product_id: 20598680 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: "R$218" currency: BRL in_stock: true reviews_count: 11 url: https://www.desertcart.com.br/products/20598680-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a store_origin: BR region: Brazil --- # Significant sound dampening 0.4mm travel reduction Less finger fatigue Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm Reduction] (135 pcs w/Screen Cloth) **Brand:** captain o-ring **Price:** R$218 **Availability:** ✅ In Stock ## Summary > ⌨️🔇 Type smarter, not louder — join the silent keyboard revolution! ## 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?** R$218 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/20598680-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 - • **Bonus Clean:** Includes premium Captain O-Ring microfiber cloth to keep your screen spotless and your setup sleek. - • **Fatigue Fighter:** Minimizes finger strain by softening key impact and shortening travel distance. - • **Silent Precision:** Slash keyboard noise with 0.4mm travel reduction for whisper-quiet typing. - • **Effortless Upgrade:** Quick 4-5 minute installation transforms your typing experience instantly. - • **Endurance Engineered:** Crafted from high-quality EPDM rubber that resists cracking and lasts the life of your keyboard. ## Overview Captain O-Ring Keyboard Switch Dampeners reduce key travel by 0.4mm to soften keystrokes and significantly cut down typing noise. Made from durable EPDM rubber, these 135-piece o-rings prevent cracking and minimize finger fatigue, enhancing comfort during long typing sessions. Easy to install and including a microfiber screen cloth, they offer a professional upgrade for mechanical keyboard enthusiasts seeking quieter, smoother typing. ## 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. ## 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 | |---------------|-------| | Additional Features | Travel | | Antenna Location | All | | Asin | B017HJMLDU | | Best Sellers Rank | #1,037 in Computer Keyboards | | Brand | Captain O-Ring | | Built In Media | 135 x Rubber O-rings, 1 Screen Cleaning Microfiber Cloth | | Button Quantity | 135 | | Color | Black | | Compatible Devices | Keyboard | | Connectivity Technology | USB | | Customer Reviews | 4.4 4.4 out of 5 stars (285) 4.4 out of 5 stars | | Enclosure Material | Rubber | | Eu Spare Part Availability Duration | 1 years | | Hand Orientation | Ambidextrous | | Item Weight | 4.54 g | | Keyboard Description | Mechanical | | Keyboard Layout | QWERTY | | Manufacturer | Captain O-Ring LLC | | Mfr Part Number | BC72657 | | Model Number | BC72657 | | Number Of Items | 135 | | Number Of Keys | 135 | | Number Of Packs | 1 | | Power Source | Wired | | Style Name | Contemporary | | Switch Type | Mechanical | | Theme | Keyboard Accessories | | Unit Count | 1 Count | | Upc | 722589526244 | ## Product Details - **Brand:** Captain O-Ring - **Color:** Black - **Compatible Devices:** Keyboard - **Connectivity Technology:** USB - **Included Components:** 135 x Rubber O-rings, 1 Screen Cleaning Microfiber Cloth - **Keyboard Description:** Mechanical - **Material:** Rubber - **Recommended Uses For Product:** All - **Special Feature:** Travel - **Style:** Contemporary ## 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) ## 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 ### ⭐⭐⭐⭐⭐ Easy to install, good sound dampening *by on Reviewed in the United States November 2, 2025* Installed on a gaming keyboard (Redragon K585) but should work on most mechanical keyboards that accept swapping key caps. The noise reduction was noticeable. Key travel was of course slightly reduced, but was expected. No adverse gaming performance. ### ⭐⭐⭐⭐⭐ A bit quieter, but biggest difference is in the feel *by on Reviewed in the United States January 27, 2017* I have a CoolerMaster QuickFire XT (blue switches) and reckoned my keys were a little bit noisy considering my housemates were awoken when I started my homework in the morning. I decided to go with these O-rings as I quite like the chiclet keyboards on some laptops and feel like I can type very fast with them, so these "fat" rings (as opposed to the red "thin" rings) should do the trick.Installation was simple, albeit a bit tedious. I don't have a keycap puller so I fashioned one from a paper clip. (You should do the same instead of paying $6.99.) I initially only installed the O-rings on the 26 "letter" keys because I wasn't sure if I'd like them or not. Of course, as soon as I hit the space or wanted a capital letter the difference (in noise and feel) was massive, so I ended up putting the o-rings on all the "main" keys too (shift, enter, backspace, alt, etc.).I quite like the difference. It is noticeably quieter, although most definitely not silent. I would say the sound level is reduced 30%. But the biggest difference is the feel, as the travel is much shorter and the keys "bounce back" at the bottom of the stroke - as a result, my typing speed went up about 12 wpm. Overall, would recommend especially if you are wanting a change in the feel as well as the sound, but if your intention is only to reduce noise, these may not be the best solution. Still, a good thing to try before buying a new keyboard with different switches, however. ### ⭐⭐⭐⭐ They were not as effective as I hoped and they changed the feel of the keys. *by on Reviewed in the United States September 20, 2023* These O-rings saved my keyboard from getting trashed. They made my keyboard a bit quieter and softer to type on. However, they didn't dampen the sound as much as I hoped, and they changed the feel of the keys slightly. They are also a bit pricey. ## 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.br/products/20598680-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a](https://www.desertcart.com.br/products/20598680-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a) --- *Product available on Desertcart Brazil* *Store origin: BR* *Last updated: 2026-08-26*