These aerobars came fitted on my TT bike when I bought it, but I replaced them after a bike fitting as they were too long for me. They have never been used since.
Clamp size: 22.2 mm.
In excellent, like-new condition.

Specifications – Profile Design 43 ASC Aerobar Extensions (400mm Carbon):
Extension length: 400 mm
Minimum length: 290 mm (from front of clamp)
Extension angle: 43°
Extension rise: 83 mm (center to top)
Extension offset: 16 mm total
Handlebar clamp diameter: 22.2 mm
Material: Carbon
Weight: 255 g per pair