Ever touched 30 mm fan while running? Damn, that hurts - not anymore.
With this protective cover, suiting your 30mm fan perfectly, your finger stays far away from the pain!
Just print and put on top of the fan securing the cover with the screws you use for your fan.
With just nearly 2mm thickness there's slightly no neccesserity to change the screws either!
Inspired by the RasPi housing https://www.thingiverse.com/make:650791.
Just hit print and there you go!