If you already have a stainless steel sintered stone and some proper tubing, get yourself this oxygen regulator! It attaches to a disposable oxygen cylinder like the ones found at a hardware store. The regulator has a 1/4" barb for attaching 1/4" ID tubing and an oxygen stone. With a twist of the knob, oxygen is released and regulated. This works great as a replacement for oxygen systems that use disposable oxygen cylinders where the regulator has gone bad. Get your yeast what they need with this regulator!
NOTE: Required but not included is an Oxygen canister. These can be purchased at most hardware stores.