An extremely fine diffusion and aeration stone that is designed to force carbonate beverages with CO2 or to oxygenate wort when used with an oxygen regulator. The . 5-micron aeration stone has much smaller holes, allowing it to carbonate beer quicker and provide a longer-lasting head. Due to the finer hole size, this diffusion stone will not properly aerate wort when used with an aeration pump.

*Please Note: Never touch the diffusion stone without using sanitized gloves. Oils on your fingertips can clog the small diffusion holes, causing the stone to stop working effectively.