Any idea if either one of them has a left threaded female end.I have these from my 2005 Triumph Speed Triple:
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Motone 10mm Mirror Extenders Triumph Bonneville, Scrambler, Thruxton, America, Speedmaster | NewBonneville
Turned out of billet aluminium to reduce weight and vibration at high speed - these mirror extenders allow you to raise the height of your mirror by 35mm. They can also be stacked one on the top of another so that a single mirror is raised 70mm Sold in Pairs as picturednewbonneville.com
If they're any use to you you're welcome to them.
Sorry, I just checked them out and they aren't left handed threads.Any idea if either one of them has a left threaded female end.
No mention of it on the site you added.