If they are 90% chance this is made in china how can we know the plastic is bpa free?

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.

Can the airlock be removed from the bung and used with other standard bungs?

Yes, the twin bubble airlock can be removed from the bung.

what is the height of these from top to bottom?

aloha it is 7 inches.Try making "mead" it is amazingly good even with regular yeast! Add raisins

Will this fit my 5 gallon class jug?

Yes. The universal bungs that come with the twin bubble airlocks are designed for 3, 5 & 6 gallon glass carboys.

Fastrack Twin Bubble Airlock for Fermentation | Hydrolocks for Fermenting Wine and Beer Making | BPA-Free Cylinder Airlock Used for Brewing Wine, Beer, Pickles & More | Transparent Airlock Set of 2

Fastrack Twin Bubble Airlock for Fermentation | Hydrolocks for Fermenting Wine and Beer Making | BPA-Free Cylinder Airlock Used for Brewing Wine, Beer, Pickles & More | Transparent Airlock Set of 2

Product ID: 49631135

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Details

Brand
FastRack
Colour
Clear/Tan
Finish type
Clear Cut
Is customisable
No
Item weight
30 Grams
Manufacturer
Fermtech

🔍Crystal-clear transparency for full fermentation visibility

🧪100% food-grade BPA-free materials

🛡️Airtight seal prevents oxidation & contamination

Description

🍷 Brew Boldly, Bubble Freely — Fermentation Made Transparent!

EFFORTLESS GAS RELEASE - Automatic CO2 venting keeps your brew safe and fresh at room temp—no manual fuss.
SEE YOUR BREW IN ACTION - Transparent design lets you monitor fermentation without lifting a finger.
UNIVERSAL FIT FLEXIBILITY - Fits snugly on most jugs and carboys with a flexible bung for a secure seal.
TRUSTED QUALITY SATISFACTION - Durable, easy-to-clean, and backed by FastRack’s 100% satisfaction guarantee.
MULTI PURPOSE FERMENTATION ESSENTIAL - Perfect for wine, beer, pickles, kimchi, and more—join the craft fermentation movement.

The Fastrack Twin Bubble Airlock set offers a BPA-free, crystal-clear, airtight fermentation solution designed for professional and home brewers alike. Its automatic CO2 venting system ensures oxidation-free fermentation, while the flexible bung fits a wide range of jugs and carboys. Ideal for fermenting wine, beer, and various foods, this durable 2-pack combines ease of use with reliable performance, making it a must-have for any serious fermentation enthusiast.

Specifications

ASIN	B00A6TRKO4
Best Sellers Rank	2,187,740 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 161 in Fermentation Airlocks
Brand Name	FastRack
Colour	Clear/Tan
Customer Reviews	4.5 4.5 out of 5 stars (13,429)
Finish Type	Clear Cut
Global Trade Identification Number	00825392000052
Included Components	Airlock and Stopper (Pack of 2)
Is Customizable?	No
Item Dimensions L x W	8L x 5W centimetres
Item Type Name	Bubble Airlock and Bung (2pk)
Item Weight	30 Grams
Manufacturer	Fermtech
Manufacturer Part Number	B00A6TRKO4
Material Type	Plastic Rubber
Model Number	B00A6TRKO4
Number of Items	2
UPC	628504292792 825392000052
Unit Count	2.0 count

Reviews

M**M

It only just arrived, so I only gave gotten to test the fit so far, but it's absolutely perfect. I'm brewing cider in a 23L glass fermenter. The bung I got from the homebrew shop just did not fit at all and I had to tape it down for the previous brew. This one fits perfectly, very securely, and the air lock fits just as securely. I was looking at caps and was astounded at their price in Australia. This fella will surely provide a better seal, though. And the hollow design means that it should fit a slight range of diameters with its ability to flex. Simple is best!

31.05.2023

Z**O

Muy funcionales, material resistente de buena calidad, fácil de lavar, cabe en la boquilla de una garrafa de un galón, muy útil para que las fermentaciones no se avinagren

27.02.2026

A**R

These are actually great quality for the price. The rubber stoppers are good quality rubber and the plastic is decent quality as well. They work perfectly as advertised. I recommend for anyone interested in buying to check rubber stopper measurements and the measurements of the hole on your jug or carbon to make sure you buy the right size. Would recommend to others and buy again in the future.

27.04.2020

A**T

Quality is good

11.08.2018

J**N

Works great. Great price b

2.03.2026

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