4 Piece S-Shape Air Lock Twin Bubble Plastic Grommet Homebrew Fermentation Wine Valve Wine Beer Making Twin Bubble Fermentation

Quality airlock.

Tube diameter is too small; it fits loosely into the stoppers I have and seals poorly. Best to find airlocks paired with their own stopper plugs.

First, this is thick high quality plastic. Second, they do not come with a top/lid. Not a big deal just use tinfoil. I like to have a lid on mine. Would not have ordered if I knew this but kinda glad I did because of the thickness of the plastic. The standard air locks today are made of cheap breakable plastic but not this product. Would be nice if they added tops/lids.

There were no caps on these airlocks and do you think I could find any to use on these? No….don’t bother buying these as they are worthless without the caps.

great for what I needed