This is specifically for the ported Better Bottle carboys. Included is the newer high-flow valve, the racking adapter, and a plastic installation rod. The newer high-flow valve has a wider and smoother flow path resulting in faster flow rates and less clogging problems. The valve can be closed without disconnecting the hose and it is easily disassembled for cleaning and sanitizing. This unit is an absolute requirement for the ported Better Bottle carboys.