Comparison : Item # A44R-446, 1/4 x 1/4 x 3/8" O.D. Tube S.A.E. Flare Fitting-Assembled with Short Rod Nut - Reducing Tee Union
Item # A44R-664, 3/8 x 3/8 x 1/4" O.D. Tube S.A.E. Flare Fitting-Assembled with Short Rod Nut - Reducing Tee Union
Item # A44R-668, 3/8 x 3/8 x 1/2" O.D. Tube S.A.E. Flare Fitting-Assembled with Short Rod Nut - Reducing Tee Union
Item # A44R-6610, 3/8 x 3/8 x 5/8" O.D. Tube S.A.E. Flare Fitting-Assembled with Short Rod Nut - Reducing Tee Union
Item # A44R-864, 1/2 x 3/8 x 1/4" O.D. Tube S.A.E. Flare Fitting-Assembled with Short Rod Nut - Reducing Tee Union