450mm Square D400 ductile iron cover and frame is a high-strength access solution designed to meet the demands of heavy-duty applications. Compliant with EN 124 standards, it is rated for loads up to D400, making it suitable for areas with high-traffic such as roads, highways, and industrial zones. Manufactured from ductile iron, it combines exceptional durability, impact resistance, and long-lasting performance, ensuring reliability in challenging environments.