Stopper

Universal stoppers have a longer taper to help produce a better fit and a snug seal, and a lip which prevents them from falling into your container. Available with a 3/8 inch hole for an airlock, or solid with no hole. #10 size is recommended for PET carboys.

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#7 stopper - with 3/8 inch hole. Top diameter 1.43 inches (36.3 mm), bottom diameter 1.19 inches (30 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Max. Temperature Rating: 158 °F (70 °C).

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You will love the versatility of this stopper!   The Universal Stopper with Hole fits a 2.8, 3, 5, 6, or 6.5 gallon glass carboy. Also fits our 500ml Erlenmeyer flask, and can be flipped over and used in most bottles! Made with a longer taper from a different material from standard stoppers to minimize popping out when wet.   Please Note: This stopper will not fit in plastic carboys, Better Bottles or Speidel Plastic Fermenters.

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Due to high demand, the case of 100 is currently out of stock. Be the first to receive your items by placing a pre-order today. We will automatically ship this to you when we receive more inventory.   Use this foam stopper with your Erelenmeyer flask when making a yeast starter. Aeration is an important aspect of making a strong, healthy starter. This is why we recommend using a stir plate, which provides continuous aeration. This foam stopper will allow air to flow freely into your flask while keeping pesky bugs and other contaminants out. A quick spray down with sanitizer is all you need. Suitable for flasks or other vessels with an inner diameter opening of 35-45mm (1-3/8" - 1-3/4"). Reusable Resists alcohols, bases, esters, and dilute acids Autoclavable up to 249°F (121°C).

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#10 stopper - with 3/8 inch hole. Top diameter 2 inches (51 mm), bottom diameter 1.66 inches (43 mm), length 1.10 inch (28 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Max. Temperature Rating: 158 °F (70 °C).  

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Size 15/16" - 1 1/16" To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole.

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#6 stopper - with 3/8 inch hole. Top diameter 1.25 inches (32 mm), bottom diameter 1.03 inches (26 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. For use with our 1 gallon glass jars (FE300). To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Max. Temperature Rating: 158 °F (70 °C).

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This stopper has two holes and we use it in the production of our #10 stopper thermowell. It features one 3/8" hole and one 1/4" hole. A racking tube or stainless tube can be inserted into the 1/4" hole with the aid of some lubrifilm, forming an airtight seal, and the 3/8" hole fits an airlock. Even after you wedge all these fittings into it, it still fits a plastic carboy neck! Use this in any configuration you can think of, it'll fit: Airlocks, Thermowells, Racking Canes, and anything else you can imagine!

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Stopper #2 - with 3/8 inch hole. Top diameter 0.83 inches (21 mm), bottom diameter 0.63 inches (15.8 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Max. Temperature Rating: 158 °F (70 °C).

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We recently discovered this premium breathable silicone barrel bung and were immediately impressed with its robust design and features. To start with, the built in tabs really help make bung removal effortless. But where the bung really shines is in its two-piece design. When set to the open position, the bung acts as an airlock and allows the release of CO2 while maintaining a seal against oxygen coming in. This makes the bung ideal for alcoholic or malolactic fermentation in barrels or tanks. When fermentation is over and you no longer want the bung to "breathe" out, you just push the center cap into the bung to create a firm seal and the FE497 becomes a solid stopper! Fits most 30 and 60 gallon barrels as well as the hole in the lid of most Variable Volume tanks! tapers from 1 7/8" to 2 1/4" diameter

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Tapered design fits most oak barrels and variable volume tank lids. Made from easy-to-clean, sanitizable silicone. Provides a tight, leak-proof seal for barrels and tanks. This solid silicone bung from CellarScience will provide a tight fit and secure seal to your oak barrel or variable volume tank lid. Made from pliable silicone for a great seal and is easy to clean and sanitize. Tapered design ensures it will fit most oak barrels as well as the hole in most variable volume lids. Top measures 2.5" including flange, 2.25" excluding flange. Tapers to 1.75" diameter at bottom.

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#3 stopper - with 3/8 inch hole. Top diameter 0.95 inches (24 mm), bottom diameter 0.71 inches (18 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Max. Temperature Rating: 158 °F (70 °C).

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Plug the hole in other stoppers when moving or shaking the fermenter.

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#6.5 stopper - with 3/8 inch hole. Top diameter 1.34 inches (34 mm), bottom diameter 1.06 inches (27 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Max. Temperature Rating: 158 °F (70 °C).

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Solid version of FE494. A new stopper that fits a 2.8,3,5,6, or 6.5 gallon glass carboy. (DOES NOT FIT BETTER BOTTLE OR PLASTIC CARBOYS) Also fits a 500ml Erlenmyer flask. Made with a longer taper from a different material, this stopper does not pop out when wet. Much more reliable, it quickly became our stopper of choice for all applications involving these size carboys.

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This stopper has two holes and we use it in the production of our #6.5 stopper thermowell. It features one 3/8" hole and one 1/4" hole. A racking tube or stainless tube can be inserted into the 1/4" hole with the aid of some lubrifilm, forming an airtight seal, and the 3/8" hole fits an airlock. Even after you wedge all this junk into it, it still fits a carboy neck! Also fits perfectly into a 1.5" tri-clamp ferrule, and the stopper's flange will ensure it doesn't fall in. Use this in any configuration you can think of, it'll fit: Airlocks, Thermowells, Racking Canes, and anything else you can imagine!

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#10 stopper - solid. Top diameter 2 inches (51 mm), bottom diameter 1.66 inches (43 mm), length 1.10 inch (28 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. Max. Temperature Rating: 158 °F (70 °C).

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#7 stopper - solid. Top diameter 1.43 inches (36.3 mm), bottom diameter 1.19 inches (30 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. Max. Temperature Rating: 158 °F (70 °C).

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Fits PET Carboys. A breathable Silicone stopper that acts as both a stopper and an airlock. Unique design allows CO2 pressure to escape but keeps Oxygen and airborne contamination out. Quickly became our stopper of choice for wine. Used by numerous commercial wineries. Also has great application for beer ferments: Will create a vacuum if fermenting wort cools (as opposed to pulling water in from your traditional airlock.) Air tight seal is great for extended fermented lager when CO2 production is still present but very slight.

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Dual Functionality: Acts as both a stopper and an airlock, allowing CO2 to escape while preventing oxygen and contaminants from entering, ensuring optimal fermentation conditions. Versatile Fit: Compatible with a wide range of containers, including 3, 5, 6, and 6.5-gallon carboys, 1-gallon bottles, growlers, and 500 mL flasks, replacing multiple stopper sizes. Ideal for Wine and Beer Ferments: Breathable stoppers are a popular choice in commercial wineries and perfect for beer fermentation, it creates a vacuum if the wort cools, preventing contamination from water airlocks. A breathable Silicone stopper that acts as both a stopper and an airlock. Unique design allows CO2 pressure to escape but keeps Oxygen and airborne contamination out. This quickly became our stopper of choice for wine, and is a popular style used by numerous commercial wineries. Also has great application for beer ferments: It will create a vacuum if fermenting wort cools (as opposed to pulling water in from your traditional airlock.) Airtight seal is great for extended fermented lager when CO2 production is still present but very slight.  Fits 3, 5, 6 & 6.5 gallon glass carboys, 1 gallon bottles, growlers, and 500 mL flasks. Replaces Stopper Sizes #6, #6.5, #7, #8 Stopper Measurements: 0.94" x 1.48" (24 mm x 37.5 mm) The flapper stopper protrudes roughly 2.5" from the stopper to allow for easy assembly Other available sizes include the Universal Breathable Bung and the Breathable Barrel Bung. All three size options can be purchased in one complete bundle with the Breather Bung Pack.  

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This is a replacement stopper for our Counter Pressure Bottle Fillers.  This will work with both KEG801 & KEG804.  Stopper - #2.5 with 3/8" hole.

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#6 stopper - solid. Top diameter 1.25 inches (32 mm), bottom diameter 1.03 inches (26 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. Max. Temperature Rating: 158 °F (70 °C).

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Size 1 1/2" - 1 13/16" To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole.

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#2 stopper - solid. Top diameter 0.83 inches (21 mm), bottom diameter 0.63 inches (15.8 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet.  Max. Temperature Rating: 158 °F (70 °C).

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Universal stoppers have a longer taper to help produce a better fit and a snug seal, and a lip which prevents them from falling into your container. Available with a 3/8 inch hole for an airlock, or solid with no hole. #10 size is recommended for PET carboys.

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#5 1/2 natural latex rubber stopper with 3/8 inch hole. Also called a size 5.5.   Size: 0.94 - 1.1 inches To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole.

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Please note: This stopper was designed for use with the BrewBuilt CoolStix which has been discontinued. Two of the holes are for an airlock and thermowell, but the third 1/2" hole was intended for the CoolStix and you will need to plug it or utilize it how you see fit. This #10 3-hole silicone stopper is used alongside the BrewBuilt CoolStix for Carboys. The holes are for a 1/2" CoolStix, an airlock, and a thermowell. The holes measure 0.500", 0.413", & 0.375" Compatible with Fermonsters and our Plastic PET Carboys listed below under "You Might Also Need".

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#9.5 stopper - with 3/8 inch hole. Top diameter 1.8 inches (46 mm), bottom diameter 1.5 inches (38 mm), length 1 inch (25 mm). BPA-free stopper made of food grade materials. Injection molded TPE for superior consistency throughout. Perfect for use with carboys, as the material sticks well to glass and PET, even when wet. To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Max. Temperature Rating: 158 °F (70 °C).

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#2 natural latex rubber stopper - solid. Top diameter 20 mm, bottom diameter 16 mm, length 25 mm. 67 stoppers per pound.

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#12 natural latex rubber stopper with 3/8 inch hole. To create a solid stopper, simply use a #000 solid stopper (FE400) to plug the hole. Top diameter 64 mm, bottom diameter 54 mm, length 27 mm

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Size 1 1/2" - 1 13/16"

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