Use with an aeration pump to aerate your wort prior to pitching yeast. 2 Micron stone attached to a 26" long stainless tube. 2 micron size works perfect with aeration pumps. Attach 3/8" ID tubing (D1706). If you are looking for the same product with a .5 micron stone see KEG595.,,Overall Length 26 7/8",OD of wand 3/8",OD of stone 1/2"