Categories Sound Effect Mailbox Post author By redForm Post date June 24, 2021 Post box open and closing. Simple as that. Download File type: audio/wav File size: 20 KB Length: 0:010 minutes, 1 second Bitrate: 176kb/s CBR Tags box, close, drop box, letter, letter box, mail, mailbox, metal, open, opening, post, post box, slot, squeak