EN124 manhole cover, B125,C250,D400,F900 Material: ductile iron Packing: 10pcs in one pallet Surface: bitumen or expoy coat ... 1. material: grey iron, ductile iron, carbon steel, or according to the customers drawings2. Manufacture process: sand casting, V casting, lost ... : manufacture and supply 11. Certificate: ISO9000: 2008 and others ductile iron manhole covers