Sorry everybody for not getting back, and thank you for your responses. I didn't get any reply alerts so I didn't realize anybody had responded to the add. Thank you for the heads up about the address, I'll fix that . The 1/2" > 3/8" hose barb (the fitting you can see in the image) is the one I'm selling. They sent me the wrong item and rather than have me send it back, they told me to keep it. I had ordered the compression fitting and received the hose barb instead. Having no use for it myself, I figured I'd see if anybody else needs it! I didn't realize they sold for $4 so I'll adjust the price accordingly. Somebody from the forum contacted me concerning the Co2 tank and bought it yesterday. The tap tower and everything else is still available. Thanks!