Surface or flush mounted to a masonry wall or fence, mail is delivered through the front flap and retrieved from the front lockable secure access door. 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 front retrieval door which is supplied with 2 keys. Front access door opening: W 7″ x H 7.5″ Incoming opening: W 9″ x H 2.5″ Weight: 15 lbs.