The OxyWand is a 24" long stainless steel 1/4" tube with a flared end that will connect directly to flared oxygen stones. This makes it easy to remove the stone to boil it. The .5 micron stone works great with compressed oxygen cylinders and the 24" wand allows for use in carboys, conicals, and more. The .5 micron stone will not work with an aeration pump.