QualArc LIB Liberty through Wall Locking Mailbox

Mounted through a wall, mail is delivered through a conventional black color letter plate. The mail then passes through a chute, drops into a collection box and is retrieved from the rear lockable secure access door. The chute depth can be adjusted between 4 to 6 inches to match the thickness of your wall. The chute is held in place with masonry and silicone adhesive. (not provided) Mailbox is made from solid aluminum, is totally waterproof and has a quality black enamel finish. It features a large capacity secure mail storage area with lockable rear retrieval door which is supplied with 2 keys. Incoming opening dimensions: W 9" × H 2.5" Rear access door opening dimensions: W 7" × H 7.5"