This stainless adapter with sealing O rings slips tightly into the current (as of March 2014) Perlick model 630SS forward seal faucet, our item J63 as well as the Flow Control Faucet 545PC, our item S38, and lets you attach 3/8" interior diameter tubing for filling growlers and bottles. This also fits Intertap Faucets.
This would be simple if Perlick marked their varying forward seal faucets with product numbers, but they do not. As of March 24th, 2014, we are selling the new Perlick model 630SS faucet, which this growler filler fits. You can recognize the new model 630SS by the distinctive P on the crown (see above picture), and also by the way they have shaved metal off both sides of the threaded handle adapter. The older Perlick models have been discontinued.