[Various Use]: 0.5 micrometer aeration stone is best for oxygenation and carbonation. Use this air stone to oxygenate wort and carbonate beer/soda fermentation. Works great for also [Safe for Health]: The whole 0.5 micrometer diffusion stone is made of stainless steel, allows 0.5 micrometer aeration stone to resist and high temperature and . [ Carbonated Flavour]: The 0.5 micrometer diffusion stone produces smaller and finer can accelerate the gas combination with liquid. Make draft beer, soda and more delicate, more exquisite and fresher. [Connect with Fittings]: Fixing the aeration stone beard to a 1/4 inch identification pipe, and the other side pipe can be fixed with the "in" pole on a drum, and then connect the to the CO2 regulator. [Boiled Clean]: The 0.5 micrometer diffusion stone must be boiled in the water to clean itself and unclog the pores. Sometimes, if the aeration stone gets blocked, can be dipped in acid for 15 seconds and then rinsed off.