How to Replace Mail Slot in Door

Heavy Gauge Wrought Brass Construction; Spring tention design to keep flag tightly closed & permits vertical installation; Overall length 10 x 3;

If your mail slot is old enough, it might be solid brass In that case, you should be able to strip off the paint residue, and polish it up

solid carbide t slot cutter solid brass or bronze in a variety of finishes Mail Slot - Mail Slots

solid brass mail slot Beveled glass, brass hardware with a patina, solid wood, arts and craft style That's gotta be an old door, if not they spent a shit load on