--- 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: "529 kr" currency: NOK in_stock: true category: "Captain O Ring" url: https://www.desertcart.no/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a store_origin: NO region: Norway --- # significant sound dampening 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:** 529 kr **Availability:** ✅ In Stock ## Summary > 🔵 Quiet keys, sharp minds — type like a pro without the noise! ## 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?** 529 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/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 - • **Bonus Clean:** Includes Captain O-Ring branded microfiber cloth to keep your screen spotless. - • **Built to Last:** Premium EPDM rubber resists cracking and tearing for long-term durability. - • **Fatigue Fighter:** Minimize finger strain by softening every keystroke impact. - • **Silent Precision:** Slash keyboard noise with 0.4mm travel reduction for whisper-quiet typing. - • **Effortless Upgrade:** Quick 4-5 minute install transforms your mechanical keyboard instantly. ## Overview Captain O-Ring Blue Keyboard Switch Dampeners reduce key travel by 0.4mm to soften keystrokes and significantly lower typing noise. Made from high-quality EPDM rubber, these 135 durable o-rings prevent cracking and extend keyboard life while minimizing finger fatigue. Easy to install and including a branded microfiber screen cloth, they offer a sleek, professional upgrade for mechanical keyboard users 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. ## 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 Name | Captain O-Ring | | Button Quantity | 135 | | Colour | Blue | | Compatible Devices | PC, Laptop, Mobile Device, Gaming Console | | Connectivity Technology | USB | | Customer Reviews | 4.5 4.5 out of 5 stars (279) | | Enclosure Material | Rubber | | Hand Orientation | Ambidextrous | | Item Type Name | keyboard | | Item Weight Unit of Measure | 0.01 Pounds | | 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 | | 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/51hz9JZz06L.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/61UzvLnCHQL.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/31Axh0aDn9L.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/511uvYpOZ3L.jpg) ![Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) - Image 5](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! ## 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.no/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a](https://www.desertcart.no/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-25*