Made of cast aluminum, Salsbury U.S.P.S. approved 4500 series post style townhouse mailboxes feature a durable powder coated finish available in four (4) contemporary colors and include an adjustable red signal flag, a magnetic door catch and a non-locking pull knob. A full-width stainless steel hinge attaches the door to the body allowing for smooth operation. Post style townhouse mailboxes can be mounted on standard posts #4565 (bolt mounted) and #4595 (in-ground mounted), classic posts #4590 (top mounted), #4591 (1-sided) and #4592 (2-sided), decorative posts #4535 (in-ground mounted) and #4536 (bolt mounted), deluxe posts #4570 (in-ground mounted, 1-sided) and #4580 (in-ground mounted, 2-sided) or a base of your choice. Multiple post style townhouse mailboxes can be mounted on the classic and deluxe 2-sided posts or on standard posts using optional spreaders. Post style townhouse mailboxes are approved for U.S.P.S. curbside mail delivery.