Concrete house numbers. Arrosigns have been making concrete house numbers for a few years now and have developed a successful method of making them in a various fonts and mainly focused on the Impact font which appears to be the most popular. Concrete house numbers are available 200mm high and 50mm thick with stand off brass locator fixings on the back.
Link to a ECOMMERCE SITE FOR PURCHASE OF concrete house numbers. https://www.bighousenumbers.com/product-category/concrete-numbers/