Internal Jug - Growler Filler Perfect for filling jugs or growlers with beer. Made of nickel-plated brass with two rubber O-rings. This allows beer to be filled from the bottom up, generating less foam. Fits most standard US draft beer faucets (except for Perlick Perl). Dimensions: 12 3/8"L when placed in faucet spout, 13 1/8" overall length.