This is a solid lid for both the 6 and 7 gallon Fermonster Pet Carboy. The solid lid can be used for storage purposes or to drill a custom size hole. Lid is constructed of heavy PET plastic and does not include sealing O-ring.
Disclaimer - These carboys are made of glass and should be handled with extreme care. We have been able to use both hot and cold liquids in them, but they are not impervious to thermal shock and can shatter when exposed to large, sudden changes in temperature. Use caution.
Note - The breather cap is now clear plastic, not black plastic