EXCLUSIVE Mail Boss Wall Mount Bracket for Letterbox Green SKU: 247810 MODEL: 54058 Error. try again later You've successfully joined the club $ 17 .60 each Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants Fits Mail Boss post mountable letterboxes. Features and benefits Rust resistant galvanised construction. Durable powdercoated finish. 100x100x260mm.