A 6" wide mailbox grid designed to keep your mail off the bottom of your mailbox to stop soaking up that rain water. Keep your mail dry. I printed four, glued together and inserted into my mailbox with magnets on one end to keep it from moving around inside the mailbox. This also allows you to easily remove it if you move or need to clean your mailbox for some reason.

You could print in ASA or some other outdoor filament, but I printed with PLA and have had this in my Phoenix mailbox for the past two years with no issues, and it has rained a lot this year!