Our 42 B mailbox post features a modern and sleek design. Offered in black powder-coated stainless steel, it has a plate-welded mount. This model is a surface mounted post for an existing concrete base. Size: 42 x 2 x 2. Looking for a stainless-steel mailbox post? Check out the 42 S. All of Vson’s timeless mailbox posts are made with expert craftsmanship and durability to last a lifetime.