My first impression when opening this package was, "25 bucks for this?!?". These grills are as tiny as the drivers they protect.
However, after closer inspection, the plastic and steel Fostex grills seem to be made robust. Since my FE83-SOL drivers are mounted in the P800-E enclosures atop my workshop desk, I feel some assurance they will not be damaged by an errant hand tool.
These are not for everyone, but for me, they are essential, and worth the price.
Four stars, since I think Fostex could charge a little less. I looked around and couldn't find a cheaper price. So if you need these too, you've come to the right place.