Made from quality materials and manufactured in England. The front letter plate is made from solid brass and coated in a choice of black, brushed chrome or antique copper. The rear casting (including the door) is made in English foundries from solid LM6 grade aluminum. The inner compartment sleeve is manufactured from sturdy zintec coated steel, and internal components are made from solid brass or stainless steel. For long life, all metal components are phosphate coated before being finished in a durable top quality low bake enamel finish. The castings have rubber seals to ensure your mailbox is completely waterproof. The lock is made from tough black polycarbonate.