Used brewed beer carbonization. The zero Micrometre stone is perfect to strain carbonate your kegged beer, or as an aeration stone earlier than fermentation. Colour: silver Material: stainless-steel Size: about 48*7*12mm Package Contents: 1 x zero Micrometre Oxygenation Stone Only the above equipment content, varied merchandise usually are not included. Note: Light and diversified displays could cause the colour of the article within the photo considerably varied from the genuine thing. The measurement allowed error is +/- 1-3cm.