Stainless Steel Aeration Wand - .5 Micron - 16"More effective oxygenation ensures high performing yeast and a markedly better finished beer without hassle and in less time. Connect to a regulator and oxygen tank for a full blown oxygenation system. The wand is 3 16" OD for use with 3 16" ID beverage tubing. California Proposition 65 Proposition 65 Warning: This product can expose you to chemicals that are known to the State of California to cause cancer and birth defects or other reproductive harm.