These are replacement parts of the UV light cover for the Elegoo Mercury Plus 2.0 washing & curing station. I had to replace the original cover because the plastic was broken multiple times around the screws. 

The replacement is very simple: Just unscrew the 12 screws holding the front and back plate and replace them with these printed parts.

Please note that the box has been made for the Mercury Plus 2.0 and may not fit older or newer versions of the Mercury Plus Station.