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Fermentation Locks & Stoppers

Below is a chart of the rubber stoppers that we stock.  You are given the stopper size, top diameter, and bottom diameter.  Please select your stoppers accordingly. Please note that stopper pricing no longer simply reflects stopper size, but, rather, the quantity of each size that our vendors sell.

Size # Top Dia. Bottom Dia.
2 25/32" 5/8"
4 1" 3/4"
5 1/2 1 7/64" 31/32"
6 1 1/4" 1 1/32"
6 1/2 1 11/32" 1 1/16"
7 1 7/16" 1 3/16"
7 1/2 1 5/8" 1 1/8"
8 1 1/2" 1 5/16"
8 1/2 1 11/16" 1 13/32"
9 1/2 1 13/16" 1 1/2"
10 1 31/32" 1 5/8"
10 1/2 2 5/64" 1 3/4"
11 2 13/64" 1 7/8"
11 1/2 2 15/32" 2"
12 2 1/2" 2 1/8"
13 2 11/16" 2 9/32"

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Three-Piece Air Lock Top quality cylindrical lock with floating bubbler & vented cap. Product Details
S-Shaped Bubbler Lock (plastic) Single piece construction, S-shaped bubbler lock with a separate dust cap. Simple design. Product Details
Universal Carboy Cover For 3, 5, 6 Gallon Carboys Holds air lock & can be used to blow-start syphon. Fits 3, 5, & 6 gallon carboys, both glass & PET plastic. Product Details
Carboy Cover For 6 1/2 Gallon Carboys Burgundy colored carboy cover specifically for the 6 1/2 gallon glass carboys only! Holds air lock & can be used to blow-start syphon. Product Details
Small Buon Vino Universal Stopper (For Glass) Fits 3, 5, 6, 6.5 gallon glass carboys. Product Details
Large Buon Vino Universal Stopper (For PET) Fits all our PET plastic carboys & many other large plastic water bottles. Product Details
#5 1/2 Drilled Rubber Stopper Fits 5 gallon plastic hedpacks. Product Details
#6 Drilled Rubber Stopper Fits one gallon and half gallon jugs. Product Details
#6 Solid Rubber Stopper Fits many one gallon & half gallon jugs. Product Details
#6 1/2 Drilled Rubber Stopper Fits most 5 gallon and many 1 gallon glass jugs. Product Details
#6 1/2 Solid Rubber Stopper Fits most 5 gallon & many 1 gallon glass jugs. Product Details
#7 Drilled Rubber Stopper Fits many 5 gallon glass jugs with the slightly larger openings. Product Details
#7 Solid Rubber Stopper Fits many 5 gallon glass jugs with the slightly larger openings. Product Details
#8 Drilled Rubber Stopper Fits many old-style one gallon glass juice jugs. Product Details
#8 1/2 Drilled Rubber Stopper Fits many old-fashioned one gallon glass juice jugs. Product Details

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