Great British Steel: This product is made in the UK with heavy duty British Steel Powder Coat Finish: Finished in a Anthracite Grey powder coat for a robust, hard wearing, and long lasting product External Dimensions: Width: 300mm - Depth: 200mm - Height: 500mm Internal Dimensions: Width: 295mm - Depth: 200mm - Height: 450mm Easy Installation: For an easy install, we recommend using the provided Allen Key to remove the parcel chamber completely from the back panel. Then use the 4 holes at the back of the mounting panel to easily mount onto the wall or fence. Once the back panel is mounted, simply re-attach the main chamber using the 2 bolts and the Allen Key once again.