ITEM NAME:0.5 Diffusion Stone Steel Beer Carbonation Aeration for Kegged Beer Wine To B1I9 0.5 Diffusion Stone Steel Beer Carbonation Aeration for Kegged Beer Wine To B1I9 Used for home brewed beer carbonization. The 0.5 Micrometre stone is perfect to force carbonate your kegged beer, or as an aeration stone prior to fermentation. Colour: silver Material: stainless steel Size: about 48*7*12mm Package Contents: 1 x 0.5 Micrometre Oxygenation Stone