Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4732790.

A Waterproof box for a Trailer Bypass board (board size 73mm width x 50mm length x 1.5mm depth).

Add extra height part to increase internal height by 15mm.

Print with support for the side holes on the main part.

Printed in ABS and it works well with an extra height part.