Architectural Mailboxes Duo Spreader Plate, Graphite Bronze Constructed of 14 gauge steel for unparalleled resistance to the elements Commercial grade powder coated finish Designed to mount 2 separate post mount mailboxes side by side; compatible with Oasis, Coronado and Bellevue Mailboxes 22.5" x 12.0" x 1.5" 9.7 lb. with a 4" x 10 " mailbox mounting bolt pattern Includes spreader plate, hardware and instructions