We have had these manufactured with 4 holes in the rear for bolting to a Wall if desired but there are many ways of mounting this post box. With a little adaptation can be built into a wall or bolted to a Post.
Also remember that it is cast iron and constructed from metal so some small rust marks may be present. Opening for letters is the standard UK Postal system 19.5 cm x 5 cm. The item "Royal Mail Post Box ER II Pillar Box Red Cast Iron Post Office Letter Box" is in sale since Friday, January 12, 2018. This item is in the category "Home, Furniture & DIY\DIY Materials\Letterboxes, Slots & Hardware\Letterboxes". The seller is "retroyears" and is located in Darlington.
This item can be shipped to United Kingdom, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Canada, Brazil, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Ukraine, Chile.