US Mail Box Auto Flag

Auto Flag for your mail box.
This will automatically raise the flag when you mail man opens the mail box.
It fits standard US mail box with flag. (see Photo)
3D print from ABS for longevity in the weather.
You will require some additional hardware.
1. A spring from an old pen (5 mm od x 30 mm long).
2. Two x 6 mm bolts that are 20 mm long (to replace the production bolts).
3. Some 1.5 mm nylon ripcord.

There are 3 parts to this design,
MailBoxDoor
This is secured to the outside