Found under the following brands:
Annovi Reverberi-AR, Westward, Bostitch, Black & Decker, Craftsman, Devilbiss Air Power, DeWalt, Emglo, Excell, Porter Cable, Speedaire
1/8" NPT x 1/4" push to fit for flexible tubing. Easy to install. has 1/8" MPT on one end and simply push your 1/4" nylon tubing into the other end of the elbow.