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En124 D400 Utility Special Anti-Settlement Ductile Iron Manhole Cover. EN124 D400 Load Rating: Meets EN124 standard with D400 grade (40 tons) load-bearing capacity for urban roads. Anti-Settlement Design: Integrated hinge and anti-theft device prevent displacement and unauthorized access. Noise Reduction: EPDM rubber pad reduces rolling noise from 70-80 dB to 50-60 dB. Customizable Options: Custom weight, color, surface treatment, and logo/text are available. Long Service Life: Corrosion resistance is 5x steel; lifespan exceeds 30 years. 3-Year Warranty: Comprehensive 3-year warranty with 24-hour online technical support.