About, from offering description: “.5 Micron Stainless Steel Diffusion / Carbonating Stone with 1/4″ Flare Thread. Use with an oxygen tank to aerate your wort or with CO2 to carbonate your beer faster. Includes a 1/4″ flare barb and flare washer to easily connect or disconnect your stone from your tubing for storage or cleaning. In order to avoid clogging the pores of your oxygen stone, it is highly recommended that you do not come in direct contact with the stone. In order to clean your diffusion stone we suggest you either run it in sanitizer or simply boil in water for 1-3 minutes.”
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Oxygenation and Aeration Supplies at William’s Brewing