What size drill bit should I use to make the hole for the grommet?

The gap diameter of the grommet is 0.57''. You can drill the hole 0.5'' or 0.57''.

Does this make the drink carbonated AND keep the outside air out?

This does not make your drink carbonated. The air lock allows the gases built up during fermentation to escape while keeping unwanted elements out of your fermenting container

if fermented with these airblocks, how long can i have my own sauerkraut?

These are durable plastic and not easy to break. If you like to make sauerkraut yourself.With these airlocks,it usaully takes one week to finish your sauerkraut. You can observe the fermentation situation via these 2 vertical chambers.If they stop bubbling, then it done.

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ONEBOM Fermentation Airlock 3 Pack, S Type Airlock Twin Bubble with Grommets for Wine Sauerkraut Making

ONEBOM Fermentation Airlock 3 Pack, S Type Airlock Twin Bubble with Grommets for Wine Sauerkraut Making

Product ID: 207124267

🌀S-shaped dual chambers for precise gas release

🍷Includes 3 grommets for secure airtight fit

🛡️Durable, sturdy plastic resists cold crashes

E£ 86

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Description

🍇 Unlock the art of perfect fermentation—because your brew deserves the best!

PLUG PLAY CONVENIENCE - Comes with 3 grommets for easy insertion into your fermenter—no extra parts needed to start brewing.
TRUSTED BY HOMEBREW PROS - Top-rated with 4.6 stars and praised for reliability and responsive customer service—join the fermentation elite.
VERSATILE FLAVOR ENHANCER - Perfect for fermenting wine, sauerkraut, and more, unlocking richer, more digestible flavors every time.
EFFORTLESS FERMENTATION CONTROL - S-type airlock design lets CO2 escape without letting oxygen in, ensuring pure, contamination-free brews.
BUILT TO LAST THROUGH EVERY BATCH - Robust construction prevents liquid backflow and withstands temperature shifts for consistent performance.

The ONEBOM Fermentation Airlock 3 Pack features a classic S-shaped dual-chamber design that allows CO2 to escape while preventing oxygen entry, crucial for clean fermentation. Made from durable plastic, it resists liquid backflow during cold crashes and includes three grommets for airtight sealing. Ideal for homebrewing wine, sauerkraut, and other fermented foods, this airlock is highly rated for reliability and ease of use, making it a must-have for serious fermenters.

Specifications

ASIN	B088CXZN79
Best Sellers Rank	#876,737 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #166 in Brewing & Fermentation Airlocks
Customer Reviews	4.6 4.6 out of 5 stars (1,276)
Date First Available	July 31, 2019
Item Weight	1.44 ounces
Package Dimensions	8.98 x 5.98 x 1.57 inches

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E£ 86

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to EGYPT.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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