Comparison : Item # 1317-12-022, 1/8" Tube O.D. (5/16-28 Thread) Inverted Flare Union Internal
Item # 1317-12-023, 3/16" Tube O.D. (3/8-24 Thread) Inverted Flare Union Internal
Item # 1317-12-024, 1/4" Tube O.D. (7/16-24 Thread) Inverted Flare Union Internal
Item # 1317-12-025, 5/16" Tube O.D. (1/2-20 Thread) Inverted Flare Union Internal
Item # 1317-12-026, 3/8" Tube O.D. (5/8-18 Thread) Inverted Flare Union Internal