[Healthy Safe]: The 0.5-micron diffusion stone is made of stainless steel, making it corrosion-resistant, high-temperature resistant, and durable.[Unique Carbonated Flavor]: The 0.5-micron diffusion stone produces smaller and finer bubbles, allowing gas to combine with liquid more efficiently. Ideal for draft beer, home-brewed soda, and other beverages to enhance smoothness and freshness.[Various Uses]: The 0.5-micron aeration stone is suitable for oxygenation and carbonation. Use it to oxygenate wort and carbonate beer or soda prior to fermentation. Also effective for other drink applications.[Connect with Fittings]: Attach the aeration stone barb to a 1/4-inch inner diameter hose. Connect the other end of the hose to the "gas in" post on a keg, then connect the keg to a CO2 regulator.[Boil for Cleaning]: The 0.5-micron diffusion stone should be boiled in water to clean and unclog pores. If blocked, it can be briefly dipped in acid for 15 seconds, then rinsed thoroughly with water.Color: SilverMaterial: Stainless SteelPackage Contents: 1 x Defoaming Stone, 1 x Hose (50 cm)Note: Light and screen display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.