Product Description Have peace of mind knowing that your mail is secured in your Manchester mailbox insert by installing a security chute that drops your mail to a locking rear door, ensuring easy retrieval when mounted in a column or wall. The chute is made of 16 gauge powder coated steel to withstands the harshest weather elements. Doors are sealed against the weather and a black masonry box is included for column or wall mounting. From the Manufacturer The Manchester with Security Chute features a cast aluminum powder coated faceplate and locking chute to mount into a column. Mail drops down a snorkel chute to a locking area at the bottom for easy access to mail and it also includes an outgoing mail slot. This mailbox keeps mail out of reach from unwanted hands and is sealed from the weather aliments.