[Healthy safe]: The Whole 0.5 Micrometre diffusion stone is made of Stainless Steel, which let our 0.5 Micrometre aeration stone anti-corrosion high temperature resistant Durable.[Unique Carbonated Flavour]: 0.5 Micrometre diffusion stone produces smaller finer bubbles which can make the gas combines with liquid faster. Make draft beer, home brew soda and other drinks more delicate, more exquisite and more fresh.[Various Use]: 0.5 Micrometre aeration stone is best for oxygenation carbonation. Use this air stone to oxygenate wort and carbonate beer soda prior to fermentation. Works great for other drinks as well[Connect With Fittings]: Attaching the aeration stone barb to a 14inch ID hose, and the other side of the hose can be attached with the "gas in" post on a keg and then connect the keg with CO2 regulator.[Boiled Clean]: The 0.5 Micrometre diffusion stone needs to be boiled in water to get clean unclog the pores. Sometimes if the aeration stone get blocked, can be dipped in acid for 15 seconds and then rinse with water.colour: silverMaterial: stainless steelPackage Contents:1 x Defoaming stone1 x hose (50cm)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +- 1-3cm.