Silicon sealing cap with 2 sealable openings for sealing carboys and other fermenting bottles. Fits PET bottles with narrow necks and glass demijohns from 10 to 34 litres.

A variety of possible applications:
-for fitting a single airlock
-for fitting an airlock in one opening and an aeration hose in the other opening
-for an airlock and a stirring paddle
-for an airlock and a thermometer
-for an airlock and a rod for allowing use of a dry-hop mesh bag

Made from flexible silicon.
Seals hermetically.
Alternative to a stopper with a hole.