The 14x12x7 NEMA Enclosures are the most popular size enclosures for outdoor wi-fi applications.  This box can withstand extreme weather conditions, is lockable, and has enough room for access points, small routers, POE switches, or camera power supplies.  It has a standard metal mounting plate, with pre-drilled holes.  It comes in options such as vented, cooled, and heated.  Additional this enclosure can be painted.  Contact GNS Wireless for more information.