Rubber Plug 12-H (35/45) with hole for fermentation tube

The rubber plug is used for plastic jugs (camping jugs) with a 50 mm cap opening. It always keeps completely sealed, whereas fermentation locks often leak carbon dioxide.

Conical plug with a 35 mm diameter at the bottom and 45 mm at the top, so it fits inside a 50 mm jug opening. Size: 35x45
Hole for fermentation tube: 8mm. Virtually indestructible and can also be used for other fermentation vessels when these have an opening of a suitable size.