ITEM NAME:2Pcs 0.5 Diffusion Stone Stainless Steel Aeration Stone Carbonating Stone w W6R9 2Pcs 0.5 Diffusion Stone Stainless Steel Aeration Stone Carbonating Stone w W6R9 Food Grade 304 SS Material:The Whole 0.5 Micrometre inline diffusion stone(1/4 barb)is made of high quality 304 Stainless Steel,which let our 2 Micrometre inline aeration stone is anti-corrosion&high temperature resistant&Durable Lower Fermentation Times&Not Easily Get Clogged:The 0.5 Micrometre inline carbonation stone have millions of tiny pores,so that this diffusion stone will quickly oxygenate wort&carbonate beer/soda prior to fermentation Connected With Fittings:1/2 inch MPT diffusion stone can be installed into the 1/2 inch FPT fitting or 1/4 inch diameter for gas line to oxygen your wort&carbonating your beer.The diffusion stone can connect with kettle&pump&wort chiller by hose Detail Attention:After carbonation,you can shake the beer keg.If do that,you beer can reach the best mouth-feel.Don't Press the body of diffusion stone by your hands.The oils on your fingers can clog the small pores in the stone Boiled to Sanitize&Clean:The 0.5 Micrometre inline diffusion stone needs to be boiled in water to sanitize&unclog the pores.If the pores in aeration stone get blocked from handling give a 15 seconds dip in hydrochloric acid before rinsing with water Color:silver material:metal Package Contents: 2* aeration head