pelopy 10 pcs 4 x 4" flat pyramid post cap for true 3-1/2" x 3-1/2" wood posts black galvanized powder coated steel weatherproof caps cover for decks, porches, or corridors mailbox 3-1/2" flat 10 is up for auction in Tools & Home Improvement. This item is in Good Condition. This auction has ended — similar items appear in live auctions regularly.