---
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: "NT$867"
currency: TWD
in_stock: true
category: "Captain O Ring"
url: https://www.desertcart.tw/products/20598680-captain-o-ring-rubber-oring-keyboard-switch-dampeners-blue-40a
store_origin: TW
region: Taiwan
---

# Significant sound dampening 0.4mm travel reduction Minimizes 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:** NT$867
**Availability:** ✅ In Stock

## Summary

> 🔕 Quiet your keyboard, 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?** NT$867 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/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 pristine.
- • **Fatigue Fighter:** Shortened key travel reduces finger strain during marathon typing sessions.
- • **Silent Precision:** Slash keyboard noise with 0.4mm travel reduction for whisper-quiet typing.
- • **Effortless Upgrade:** Quick 4-5 minute installation transforms your keyboard’s feel and sound instantly.
- • **Endurance Engineered:** Crafted from high-quality EPDM rubber that resists cracking and tearing for long-lasting performance.

## Overview

Captain O-Ring Rubber O-Ring Keyboard Switch Dampeners reduce key travel by 0.4mm to soften keystrokes and minimize finger fatigue. Made from durable EPDM rubber, these 135-piece dampeners significantly lower typing noise by preventing key bottoming out. Easy to install and built to last, they come with a microfiber screen cleaning cloth for added value.

## 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 |
| Additional Features | Travel |
| Antenna Location | All |
| 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 out of 5 stars 284 Reviews |
| EU Spare Part Availability Duration | 1 Years |
| Enclosure Material | Rubber |
| Hand Orientation | Ambidextrous |
| Item Weight | 0.01 Pounds |
| Keyboard Description | Mechanical |
| Keyboard Layout | QWERTY |
| Manufacturer | Captain O-Ring LLC |
| Mfr Part Number | BC72657 |
| Model Number | BC72657 |
| Number of Keys | 135 |
| Power Source | Wired |
| Recommended Uses For Product | All |
| Special Feature | Travel |
| Style Name | Contemporary |
| Switch Type | Mechanical |
| Theme | Keyboard Accessories |
| UPC | 722589526244 |
| Unit Count | 1.0 Count |

## 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)
![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)
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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-07-10*