https://www.toolsdelivered.com/will...ve-flare-nut-crowfoot-wrench-12-pt-1-4.7-inch
It looks like a 1 9/16, but maybe a little less lol
It looks like a 1 9/16, but maybe a little less lol

After looking at the chart (and double checking my set of snap ons just to be sure) im thinking that is supposed to read 1 3/8..