Features 1、Made of high quality stainless steel material, anti-corrosion, high temperature resistant and durable. 2、It is an easy way to carbonate your fermented beer, or oxygenate your fermenting beer inline. 3、Two sizes available, 0.5 micron and 2 micron stone, you can choose the right one you need. 4、Lower fermentation time: quickly oxygenate wort and carbonate beer/soda prior to fermentation. 5、Easy to clean and use, remember to clean and sanitize diffusion stones thoroughly before and after each use. Features: 1. Made of high quality stainless steel material, anti-corrosion, high temperature resistant and durable. 2. It is an easy way to carbonate your fermented beer, or oxygenate your fermenting beer inline. 3. Two sizes available, 0.5 micron and 2 micron stone, you can choose the right one you need. 4. Lower fermentation time: quickly oxygenate wort and carbonate beer/soda prior to fermentation. 5. Easy to clean and use, remember to clean and sanitize diffusion stones thoroughly before and after each use. Specification: Condition:100% Brand New Material: stainless steel Color: As Pictures Shown Size: approx.7cm/2.8in Package list: 1 * MPT Oxygen Stone Package List