So a buddy of mine got one of those CL deals that you always read about. He got 11 cornie kegs, 1 25lb CO2 tank with regulator, 1 25lb Nitrogen tank with regulator, and some miscellaneous parts for $300. One of the parts we don't know what it is. Does anyone know what this is?
My thought was that it was some kind of aeration stone since the tip has a porous rock or something in it.