Durable Construction: Made from corrosion-resistant Iron, powder-coated for long-lasting use. Weatherproof Design: Fully weather-resistant with no springs to corrode, ensuring your mail stays dry. Secure Lock: Keep your mail safe and secure with the ACL Post Box's sturdy and reliable lock system. Easy Installation: The ACL Post Box is designed for easy installation with pre-drilled holes that make it simple to mount onto any wall or fence. Compact Yet Spacious: Designed to accommodate A5 mail with slot dimensions of 180 x 20 mm, perfect for C5 envelopes (229 x 20 mm).