The TACRAFT Oxygenation System pumps pure oxygen into your cooled wort using a disposable oxygen tank and stainless steel diffusion stone. Takes around 1-2 minutes of operation to achieve adequate oxygen levels, depending on the starting gravity of the wort. Comes with a regulator, .5 micron stainless steel oxygenation stone and tubing. The regulator is left hand thread. Disposable Oxygen tanks not included.