Brand new, hand made bubbler airlock glass. Excellent for home making beer, wine and mash.
It prevents unwanted substances from entering the interior demijohn.
This glass bubbler, you should press gently on the cork before placing the cap in the balloon / demijohn.

Size:
weight: lb 0,04 ( 20g )
height : 6,10 inches - 6,69 inches       ( 155mm - 170mm )
external diameter: 0,31 inches   ( 8,0mm )
internal diameter: 0,24 inches   ( 6,0mm )