---
product_id: 114045571
title: "Captain O-Ring LLC Oring Keyboard Switch Dampeners Blue [40A-R 0.4Mm] Reduction (135 Pcs W/Screen Cloth)"
brand: "captain o-ring"
price: "Rp1025417"
currency: IDR
in_stock: true
reviews_count: 6
category: "Captain O Ring"
url: https://www.desertcart.id/products/114045571-captain-o-ring-llc-oring-keyboard-switch-dampeners-blue-40a
store_origin: ID
region: Indonesia
---

# 30% noise reduction 0.4mm travel reduction durable EPDM rubber Captain O-Ring LLC Oring Keyboard Switch Dampeners Blue [40A-R 0.4Mm] Reduction (135 Pcs W/Screen Cloth)

**Brand:** captain o-ring
**Price:** Rp1025417
**Availability:** ✅ In Stock

## Summary

> ⌨️🔇 Elevate your typing game with quieter, softer keystrokes—because your desk deserves the best!

## Quick Answers

- **What is this?** Captain O-Ring LLC Oring Keyboard Switch Dampeners Blue [40A-R 0.4Mm] Reduction (135 Pcs W/Screen Cloth) by captain o-ring
- **How much does it cost?** Rp1025417 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/114045571-captain-o-ring-llc-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

- • **Whisper-Quiet Workflow:** Dampens key noise by up to 30%—keep your workspace zen
- • **Complete Kit for Keyboard Zen:** 135 O-rings plus a microfiber cleaning cloth for pristine keys
- • **Built to Last, Built for Comfort:** Premium EPDM rubber resists cracking and tearing over time
- • **Softer Keystrokes, Sharper Focus:** 0.4mm travel cut for cushioned, fatigue-free typing
- • **Seamless Fit for Mechanical Switches:** Optimized for MX Blue and Brown switches without losing tactility

## Overview

Captain O-Ring LLC’s Blue Keyboard Switch Dampeners reduce key travel by 0.4mm to soften keystrokes and minimize finger fatigue. Crafted from high-quality EPDM rubber, these 135 O-rings cut keyboard noise by approximately 30%, delivering a quieter, more pleasant typing experience. Included is a microfiber cleaning cloth to keep your keyboard spotless, making this set ideal for mechanical switch users seeking enhanced comfort and sound reduction.

## Description

International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

Review: makes a big difference, even on clicky blues - 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.
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.

## 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 |
| Antenna Location | All |
| Best Sellers Rank | 298,860 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 14,450 in Computer Keyboard & Mice Accessories |
| Box Contents | 135 O-Rings, Captain O-Ring Screen Cleaning Microfiber Cloth |
| Brand | Captain O-Ring |
| Brand Name | Captain O-Ring |
| Button Quantity | 135 |
| Colour | Black |
| Compatible Devices | Keyboard |
| Compatible devices | Keyboard |
| Connectivity Technology | USB |
| Connectivity technology | USB |
| Customer Reviews | 4.5 out of 5 stars 279 Reviews |
| EU Spare Part Availability Duration | 1 Years |
| Enclosure Material | Rubber |
| Hand Orientation | Ambidextrous |
| Item Weight | 0.01 Pounds |
| Keyboard Description | Wireless |
| Keyboard Layout | QWERTY |
| Keyboard description | Wireless |
| Manufacturer | Captain O-Ring LLC |
| Manufacturer Part Number | BC72657 |
| Model Number | BC72657 |
| Number of Items | 135 |
| Number of Keys | 135 |
| Number of Packs | 1 |
| Power Source | Wireless Power |
| Product Features | Travel |
| Recommended uses for product | All |
| Special feature | Travel |
| Style Name | Modern |
| Switch Type | Mechanical |
| Theme | Keyboard Accessories |
| UPC | 722589526244 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Captain O-Ring
- **Compatible devices:** Keyboard
- **Connectivity technology:** USB
- **Keyboard description:** Wireless
- **Recommended uses for product:** All
- **Special feature:** Travel
- **Colour:** Black
- **Style:** Modern
- **Material:** Rubber
- **Included components:** 135 O-Rings, Captain O-Ring Screen Cleaning Microfiber Cloth

## Images

![Captain O-Ring LLC 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 LLC 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 LLC 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 LLC 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

### ⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ 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.

## 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

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*Product available on Desertcart Indonesia*
*Store origin: ID*
*Last updated: 2026-09-14*