Comparison : Item # 1317-12-337, 3/16" (3/8-24 Thread) Female Inverted Flare Seat x M10-1.25 Male Metric Bubble Flare Adapter Standard to Metric Bubble
Item # 1317-12-336, 3/16" (3/8-24 Thread) Female Inverted Flare Seat x M11-1.5 Male Metric Bubble Flare Adapter Standard to Metric Bubble
Item # 1317-12-341, 3/16" (3/8-24 Thread) Female Inverted Flare Seat x M12-1.0 Male Metric Bubble Flare Adapter Standard to Metric Bubble
Item # 1317-12-339, 3/16" (3/8-24 Thread) Female Inverted Flare Seat x M13-1.5 Male Metric Bubble Flare Adapter Standard to Metric Bubble