D400 Ductile Iron Manhole Cover

D400 Ductile Iron Round Manhole Cover Adjustable Anti-settlement Inspection Manhole Cover (Direct 700). This adjustable, anti-settlement ductile iron round manhole cover is suitable for urban roads, motor vehicle lanes, parking lots, municipal pipelines, and various heavy-duty traffic areas. Made of ductile iron, it boasts excellent load-bearing capacity, impact resistance, and durability. Adjustable to suit road construction and elevation, it helps reduce the height difference between the manhole cover and the road surface, mitigating issues such as settlement, vehicle bouncing, loosening, and damage to surrounding road surfaces.