[Healthy and Safe]: The 0.5 Micrometer diffusion stone is made of stainless steel, making it corrosion-resistant, high-temperature resistant, and durable. [Unique Carbonated Flavor]: The 0.5 Micrometer diffusion stone produces smaller and finer bubbles, allowing gas to combine with liquid more quickly. Ideal for making draft beer, homemade soda, and other beverages smoother and more refined. [Various Uses]: The 0.5 Micrometer aeration stone is ideal for oxygenation and carbonation. Use it to oxygenate wort and carbonate beer or soda before fermentation. Also works well with other beverages. [Connects 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 Micrometer diffusion stone should be boiled in water to clean and unclog the pores. If the stone becomes blocked, it can be dipped in acid for 15 seconds, then rinsed thoroughly with water. Color: Silver Material: Stainless Steel Package Contents: 1 x Aeration Stone 1 x Hose (50 cm) Note: Only the items listed above are included. Other products are not included. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.