---
product_id: 276840
title: "Fastrack Twin Bubble Airlock and Carboy Bung (2-Pack) | Fermentation Airlocks for Homebrewing Beer, Wine, Mead, and Kombucha"
brand: "fastrack"
price: "$14.91"
currency: USD
in_stock: true
reviews_count: 13
category: "Fast Rack"
url: https://www.desertcart.us/products/276840-fastrack-twin-bubble-airlock-and-carboy-bung-2-pack-fermentation
store_origin: US
region: United States of America
---

# Transparent plastic for easy visual monitoring Airtight bung prevents oxidation Twin bubble design for precise fermentation control Fastrack Twin Bubble Airlock and Carboy Bung (2-Pack) | Fermentation Airlocks for Homebrewing Beer, Wine, Mead, and Kombucha

**Brand:** fastrack
**Price:** $14.91
**Availability:** ✅ In Stock

## Summary

> 🍷 Elevate your fermentation game—because your craft deserves precision and style.

## Quick Answers

- **What is this?** Fastrack Twin Bubble Airlock and Carboy Bung (2-Pack) | Fermentation Airlocks for Homebrewing Beer, Wine, Mead, and Kombucha by fastrack
- **How much does it cost?** $14.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/276840-fastrack-twin-bubble-airlock-and-carboy-bung-2-pack-fermentation)

## Best For

- fastrack enthusiasts

## Why This Product

- Trusted fastrack brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durability Meets Design:** Strong, reusable materials built to last season after season, ensuring your fermentation game stays on point year-round.
- • **Crystal Clear Monitoring:** Made from food-grade transparent plastic, allowing you to visually track fermentation progress with ease and confidence.
- • **Versatile Crafting Essential:** Ideal for beer, wine, mead, kombucha, and even fermented foods like kimchi and sauerkraut—expand your artisanal repertoire.
- • **Effortless Fermentation Mastery:** Automatically releases CO2 pressure without manual intervention, so you can focus on perfecting your brew.
- • **Universal Fit, Universal Flavor:** Comes with two universal-fit carboy bungs compatible with most jugs and carboys—no guesswork, just seamless setup.

## Overview

The Twin Bubble Airlock and Carboy Bung pack includes two airtight, food-grade transparent airlocks and universal-fit bungs designed to release CO2 while preventing oxidation during fermentation. Perfect for homebrewers and fermenters of beer, wine, mead, kombucha, and fermented foods, this durable set offers easy installation and clear visual monitoring to ensure consistent, high-quality results every time.

## Description

Buy Fastrack Twin Bubble Airlock and Carboy Bung (2-Pack) | Fermentation Airlocks for Homebrewing Beer, Wine, Mead, and Kombucha: Airlocks - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Effective and works as advertised. - Bought these a few years ago and still using them every year to make wine. If you haven't tried it, plant some vines and go for it. It's very satisfying.
Review: Good price very functional - Worked aa expected

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00A6TRKO4 |
| ASIN  | B00A6TRKO4 |
| Best Sellers Rank | #11,488 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #3 in Brewing & Fermentation Airlocks |
| Brand | FastRack |
| Color | Clear/Tan |
| Customer Reviews | 4.6 4.6 out of 5 stars (13,818) |
| Date First Available | November 13, 2012 |
| Date First Available  | November 13, 2012 |
| Global Trade Identification Number | 00825392000052 |
| Is Customizable | No |
| Is Discontinued By Manufacturer | No |
| Is Discontinued By Manufacturer  | No |
| Item Weight | 1.06 ounces |
| Item model number | B00A6TRKO4 |
| Item model number  | B00A6TRKO4 |
| Manufacturer | Fermtech |
| Manufacturer  | Fermtech |
| Material | Plastic, Rubber |
| Number of Items | 2 |
| Product Dimensions | 3.15"L x 1.97"W |
| Product Dimensions  | 3.15 x 1.97 x 3.15 inches; 1.06 ounces |
| UPC | 628504292792 825392000052 |

## Product Details

- **Brand:** FastRack
- **Color:** Clear/Tan
- **Global Trade Identification Number:** 00825392000052
- **Is Customizable:** No
- **Item Weight:** 30 Grams
- **Manufacturer:** Fermtech
- **Material:** Plastic, Rubber
- **Number of Items:** 2
- **Product Dimensions:** 3.15"L x 1.97"W
- **UPC:** 628504292792 825392000052

## Images

![Fastrack Twin Bubble Airlock and Carboy Bung (2-Pack) | Fermentation Airlocks for Homebrewing Beer, Wine, Mead, and Kombucha - Image 1](https://m.media-amazon.com/images/I/41lj7thLfSL.jpg)

## Questions & Answers

**Q: If they are 90% chance this is made in china how can we know the plastic is bpa free?**
A: Don't see that it matters. Nothing passes through the device into the carboy and positive to static neutral pressure inside prevents air from entering. Zero contact means no chance of transfer.

**Q: Can the airlock be removed from the bung and used with other standard bungs?**
A: Yes, the twin bubble airlock can be removed from the bung.

**Q: what is the height of these from top to bottom?**
A: aloha it is 7 inches.Try making "mead" it is amazingly good even with regular yeast! Add raisins

**Q: Will this fit my 5 gallon class jug?**
A: Yes. The universal bungs that come with the twin bubble airlocks are designed for 3, 5 & 6 gallon glass carboys.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Effective and works as advertised.
*by D***A on December 11, 2025*

Bought these a few years ago and still using them every year to make wine. If you haven't tried it, plant some vines and go for it. It's very satisfying.

### ⭐⭐⭐⭐⭐ Good price very functional
*by M***N on December 22, 2025*

Worked aa expected

### ⭐⭐⭐⭐⭐ Quality bubblers!
*by T***Y on October 27, 2025*

Great for homemade wine making. I used these without the stopper on my primary fermenter and with the stopper on my secondary glass carboy. They are well made and work very well. I did notice the stoppers liked to slip up out of the neck of the glass carboy a little so I had to tie them down into the neck but this may be unrelated to the stopper itself.

## Frequently Bought Together

- Twin Bubble Airlock and Carboy Bung (Pack of 2)
- Lalvin EC-1118 Wine Yeast (10 Pack) - Champagne Yeast - Make Wine Cider Mead Kombucha At Home - 5 g Sachets - Saccharomyces cerevisiae - Sold by CAPYBARA Distributors Inc.
- Fermtech - Auto Siphon Mini with 6 Ft of Food Safe Tubing & Clamp - Easy Home Brewing, Winemaking Kit, Complete System for Beer, Wine, Liquid Transfer & Fermentation Tools - Perfect for Small Batches

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-26*