Postbox slot cover
thingiverse
A simple cover for a postbox slot. The total length is 30 cm, but it comes in two pieces that are kept together by nuts and bolts. The holes that hold the two parts together have a diameter of 6 mm, the holes on the vertical "arms" are 5 mm. One of my earlier Fusion 360 designs, a good excuse to get my hands dirty with CAD (and then painting PLA).
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