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2026 New Watertight Manhole Covers D400 Round En124 Lockable SMC 900mm Manhole Cover for Gas Station. 100% Waterproof Design: Features unique rubber hollow design with EPDM material and double sealing rings. Long Service Life: Designed for over 30 years of service life with high durability. UV Resistance: Exclusive recipe ensures no fading for more than 3 years. Lightweight Composite: Optimized structural design and material composition for easy handling. Anti-slip Surface: Special surface design ensures safety in various weather conditions. High Load Capacity: Meets EN124 D400 loading class standards for heavy traffic. OEM and ODM Support: Flexible customization options available for brand and design.