The file 'Mail Slot Flap 3D Printer Model' is (stl) file type, size is 90.4KB.
Mail slot flap for 12" x 3" mail slot opening.
Print one of the left and right pieces, and two of the bracket pieces.
(Or print one of the pack, if it fits in your printer's build area.)
40% infill seems to make for good solid brackets and a fairly substantially weighted flap. The pins needed a little post-processing smoothing with a knife, but after that, it works smoothly.
Mail_slot_flap_bracket.stl | 109.2KB | |
Mail_slot_flap_left.stl | 66.1KB | |
Mail_slot_flap_pack.stl | 344.6KB | |
Mail_slot_flap_right.stl | 60.4KB |