The Model f6.5b fermenter is the best buy for the small batch brewer and for the instructor is a class room situation. The Affordable Conical has all the attributes of a very large fermenter plus they will withstand hard use and are easy to clean and sterilize. The Affordable Conical ships ready to brew, all you need to do is assemble the stand, clean and sterilize. Permeability is not an issues with our thick walled fermenter tanks. Also you need not worry about lead leaching into the wort or wine with the new California standard lead free brass valves.