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4 air locks made of durable clear plastic, complete with dust cap 4 cork plugs drilled with hole in which an airlock fits Standard size and reusable Airlock fits into the drill hole in the plug 4 air bubbles and 4 cork stoppers in each pack.; Product description If you are looking for high quality home brewing accessories, our fermentation tubes and cork stoppers are a perfect choice. This set contains four air bubbles and four cork stoppers and gives you everything you need to properly ferment your favourite drinks and foods. Our air locks feature a durable, clear plastic construction that allows you to easily observe the fermentation process. They are designed to fit snugly into the included punched cork stoppers, creating an airtight seal that helps prevent contamination and oxidation. Made from high quality cork, our cork stoppers are designed to fit perfectly into standard size fermentation vessels. They provide an airtight seal that helps maintain a consistent fermentation environment while allowing excess gas to escape through the airlock. The cork stoppers are standard size and reusable. They have a drilled hole for an airlock and are suitable for use with 5 litre glass jars. Size: height 32mm, diameter (top) 30mm, diameter (base) 27mm Just add water to the airlocks and see bubbles as your beer or wine is fermenting. The air locks fit into rubber or cork stoppers and also fermentation barrel lids that are drilled and equipped with an eyelet. With this set of 4 fermentation locks and 4 cork stoppers, you can start multiple fermentation projects at the same time or replace old or damaged airlocks and plugs in your existing fermentation equipment. Whether you're an experienced fermenter or just starting out, our airlocks and cork stoppers are the perfect choice for optimal fermentation results.; Product description If you are looking for high quality home brewing accessories, our fermentation tubes and cork stoppers are a perfect choice. This set contains four air bubbles and four cork stoppers and gives you everything you need to properly ferment your favourite drinks and foods. Our air locks feature a durable, clear plastic construction that allows you to easily observe the fermentation process. They are designed to fit snugly into the included punched cork stoppers, creating an airtight seal that helps prevent contamination and oxidation. Made from high quality cork, our cork stoppers are designed to fit perfectly into standard size fermentation vessels. They provide an airtight seal that helps maintain a consistent fermentation environment while allowing excess gas to escape through the airlock. The cork stoppers are standard size and reusable. They have a drilled hole for an airlock and are suitable for use with 5 litre glass jars. Size: height 32mm, diameter (top) 30mm, diameter (base) 27mm Just add water to the airlocks and see bubbles as your beer or wine is fermenting. The air locks fit into rubber or cork stoppers and also fermentation barrel lids that are drilled and equipped with an eyelet. With this set of 4 fermentation locks and 4 cork stoppers, you can start multiple fermentation projects at the same time or replace old or damaged airlocks and plugs in your existing fermentation equipment. Whether you're an experienced fermenter or just starting out, our airlocks and cork stoppers are the perfect choice for optimal fermentation results.; If you are looking for high quality home brewing accessories, our fermentation tubes and cork stoppers are a perfect choice. This set contains four air bubbles and four cork stoppers and gives you everything you need to properly ferment your favourite drinks and foods. Our air locks feature a durable, clear plastic construction that allows you to easily observe the fermentation process. They are designed to fit snugly into the included punched cork stoppers, creating an airtight seal that helps prevent contamination and oxidation. Made from high quality cork, our cork stoppers are designed to fit perfectly into standard size fermentation vessels. They provide an airtight seal that helps maintain a consistent fermentation environment while allowing excess gas to escape through the airlock. The cork stoppers are standard size and reusable. They have a drilled hole for an airlock and are suitable for use with 5 litre glass jars. Size: height 32mm, diameter (top) 30mm, diameter (base) 27mm Just add water to the airlocks and see bubbles as your beer or wine is fermenting. The air locks fit into rubber or cork stoppers and also fermentation barrel lids that are drilled and equipped with an eyelet. With this set of 4 fermentation locks and 4 cork stoppers, you can start multiple fermentation projects at the same time or replace old or damaged airlocks and plugs in your existing fermentation equipment. Whether you're an experienced fermenter or just starting out, our airlocks and cork stoppers are the perfect choice for optimal fermentation results.