Would that be this item? [1] The product description and SKU match.

It's not clear who "FS" is. A reseller? A manufacturer? They seem to be in Singapore. There's no excuse for the external plastic sheath disintegrating. They must have formulated the plastic wrong. The terms specify a 30 day warranty.

Here's a catalog of real mil-spec fiber optic cables.[2] This is overkill for home applications; you put these in a fighter jet.

In between are Telecom Industry Association compliant fiber optic cables. That's what telcos use. There are US manufacturers with real plants and addresses.

[1] https://www.fs.com/products/70220.html

[2] https://www.glenair.com/catalogs/fiber-optics.pdf

FS is almost certainly fs.com, who do sell lots of fiber stuff.

I agree that less-than-milspec equipment should survive being installed in a home, but... this fiber didn't. https://news.ycombinator.com/item?id=46572962 seems to be relevant.

FS is a US company. They are a fairly reasonable option for third party networking equipment. We run a ton of their SPF+ transceivers in our racks, as they're significantly cheaper than OEM parts and indistinguishable in operation and we've had excellent support the handful of times we needed it over the years.