Free 

It's a fan cover / grill with the Aperture Science logo from Portal
Use M3 countersunk bolts
I printed the 4mm countersunk with CR-ABS Black at 240 degrees











![Minimal Fan Cover [Light] 40mm 4010](https://cache.polyzon.org/api/img?url=https%3A%2F%2Fresize.thingiverse.com%2F%3Furl%3Dhttps%3A%2F%2Fcdn.thingiverse.com%2Fassets%2F7e%2F96%2F37%2F75%2F7d%2F3d2f3c60-e44e-43e0-acbc-9a333b74b750.jpg%26w%3D1024%26h%3D1024%26fit%3Dcontain%26cbg%3Dwhite%26n%3D-1&w=300)
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