TWO HOLE STOPPER #6.5 Drilled 1-3/8 in. Hole and 1-1/4 in Hole


Here’s a hard to find #6.5 2-Hole rubber stopper for fitting and airlock AND a thermometer or other device.  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!  Use this in any configuration you can think of,  Airlocks, Thermowells, Racking Canes, or Aquarium pump powered filter arrangements and many others.  These fit most  standard glass fermenters! Fits almost all gallon jugs, 3 gal glass Carboys, and 5 gal glass Carboys.  NOTE: Style changeover.  This is the FE490A Soon we will be sending the FE490B which is whiter and has a wider brim.  Both stoppers fit the same carboys and do the same thing.

11 in stock

SKU: FE490A Category:


  • Stopper Size #6.5
  • Laboratory grade natural rubber stoppers
  • Tapered with two holes.
  • Top measurement 1 5/16″, Bottom measurement 1 1/16




Additional information

Weight 3 oz
Dimensions 9 × 6 × 1 in


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