HOW IT WORKS: This diffuser stone has millions of air holes so it can quickly oxygenate wort and carbonated beer/soda before fermentation. EASY INSTALLATION: The 1/4-inch barbs are easily attached or disconnected for convenience and practicality, making it a reliable accessory for brewing beer. PREMIUM QUALITY MATERIAL: Made of 304 stainless steel, which makes the in-line aeration stone -resistant, heat-resistant and durable. EASY TO : To your diffuser stone, we recommend that you simply boil your oxygen diffuser stone in water for 1-3 minutes. CAUTION: Avoid clogging the diffuser stone and do not touch the body of the diffuser stone with your hands. Grease from your fingers will cause the diffuser stone to boil.