--- 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: "₨23792" currency: LKR in_stock: false url: https://www.desertcart.lk/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a store_origin: LK region: Sri Lanka --- # 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:** ₨23792 **Availability:** ❌ Out of Stock ## Summary > 🔵 Quiet comfort meets pro-level durability — type like a Captain! ## 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?** ₨23792 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/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 - • **Built to Last:** premium EPDM rubber resists cracking and tearing over time - • **Whisper-Quiet Workflow:** dramatically reduces keyboard noise for focused productivity - • **Effortless Installation:** quick 4-5 min setup keeps you typing without downtime - • **Bonus Screen Cleaning Cloth:** keeps your workspace pristine and professional - • **Softer Keystrokes, Less Fatigue:** 0.4mm travel cut for cushioned typing comfort ## Overview Captain O-Ring Blue Keyboard Switch Dampeners reduce key travel by 0.4mm to soften keystrokes and minimize finger fatigue while significantly lowering typing noise. Made from high-quality EPDM rubber, these 135-piece dampeners resist cracking and tearing for long-lasting performance. Included is a microfiber screen cleaning cloth, all packaged for easy installation and backed by a one-year warranty. ## Description Captain O-Ring - Rubber Oring Keyboard Switch Dampeners Blue [40A-R 0.4mm] Reduction (135 pcs w/ screen cloth) ## 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 | |---------------|-------| | Brand | Captain O-Ring | | Manufacturer | Captain O-Ring LLC | | Colour | Blue | | Item Height | 0.5 Inches | | Item Width | 3.6 Inches | | Product Dimensions | 17.78 x 9.14 x 1.27 cm; 4.54 g | | Item model number | BC72657 | | Hardware Platform | Laptop | | Are Batteries Included | No | | Manufacturer | Captain O-Ring LLC | | Country of Origin | USA | | Item Weight | 4.54 g | ## 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! ## 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.lk/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a](https://www.desertcart.lk/products/210138655-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-05-29*