"Posts with nets on top on side of street in the Netherlands"
A: "My guess is that these are to help bats orientate themselves, until the trees are larger. Did they recently cut down trees along this road? Bats need to hear reflection of their sound to know where they are going. These things will replace the leaves in that."
For you younger guys. Dating was much more fun before pantyhose.
It is used to keep the pistons from the disk brake caliper separated when the wheel is removed in case the brake lever is pushed accidentally.
It's from Adafruit, the company famous for their DD8008S and attempted takeover of Apple... so everything else is obvious.