Features: *Brand new and high quality. *The Whole diffusion stone is made of 304 Stainless Steel, which let our aeration stone anti-corrosion & high temperature resistant & Durable. *The 0.5 & 2 micrometre inline diffusion stone(1/4 barb) have millions of tiny pores, so that this diffusion stone will quickly oxygenate wort & carbonate beer/seltzer prior to fermentation. *The diffusion stone can connect with kettle&pump&wort chiller by hose. *Perfect for DIY Beer/Seltzer Water Brewing. Specifications: Product Name: Diffusion Stone Material: Stainless Steel Color: Silvery Size: 48x12x7mm/1.89x0.47x0.28inch Styles: 0.5 Micrometre; 2.0 Micrometre Package Include: 1* Diffusion Stone Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Diffusion Stone Beer Carbonation Aeration Stone Beer Wine Making 0.5 2Micrometre Materials: Made of high quality materials, robust and durable, safe and convenient to use. Size: matched to the corresponding model to match your working tool needs, check if it is the size you need before you buy. Function: This is a good companion you need on your tools, giving you a more convenient working life, in case you are busy indoors and outdoors Satisfaction guarantee: Your purchase is fully protected when you order today. If you are not satisfied with with our products, contact us any time, We will get you back within 24 hours try our best to make things right.