The Alembic Copper Domed Lid fits the DigiBoil 35 L boiler,  and BrewZilla 35L size only. 

The hole size to fit a pot still condenser is 47mm in width

The large copper surface area of this copper dome acts as a catalyst with the vapor in the still and help to enhance and concentrate the flavours and aromas during the distilling process.

It can also help remove unwanted sulfur compounds which results in a smoother richer, sweeter tasting spirit.

$245.00 for the dome only. Condensor is extra