These are designed to fit the most common sizes.
They are essential pieces of homebrew kit and do need replacing fairly often.
So, we 've given you a discount if you buy bulk! We are nice people!
Fits most demi johns, if you have the old screw neck ones you might find they're too big.
I don't like to say this but you're probably better throwing the old screw neck demi johns away!
A white rubber bung with hole about 42 mm across the tail that fits the Betta Bottle
