This reduces the chance of "off" flavors due to yeast stress. Oxygenation Aeration. Simply attach one end to a couple of feet of 1/4" PVC tubing to the end of the dip tube inside of the keg, and the other end to The Stone.
0.5 Micron Carbonation Aeration Diffusion Oxygen Stone. Home Brew Corny Beer Keg
1/2" NPT Inline Aeration Diffusion Oxygen Stone 0.5 & 2.0 Micron. Homebrew Beer
Stainless Steel Beer Carbonation Aeration Stone Smooth and Even Oxygenation
AStainless Steel Diffusion Stone Aeration Carbonating Stone Beer Bar Accessories
2 Micron Stainless Steel Diffusion Stone / Air Stone - Home Brew carbonation
Grainfather Whirlpool and Aeration Brewing Paddle