So, I live in a forest with a mile of gravel road to get to asphalt. That led me to get a gravel bike (bike number 8). Then I needed a water bottle cage - my gravelly was a lightweight Specialized Diverge - in black - and the Blackburn Bottle cage was PERFECT! It works like a champ. I have used Blackburn products in the past with little to no disappointment, where they have exceeded expectations and this bottle cage is no exception!
The mirror folds and unfolds with just enough resistance to keep it from slipping once it is adjusted. It's easy to adjust while riding and large enough to give a clear view of approaching riders or traffic.