... Ductile Cast Iron Types: GGG40, GGG50, GGG60, GGG70, GGG80, GGG90Shape: Round, Square, Ractangle Features:1) Product information: Manhole Covers are ... , C250, D400, E600 and F900 b) A60005 for casting design c) Major standards designs available d) As per ... Experience on Casting Various Products, Meet Your Demand! Any inquiry, pls don't hesitate to contact us! Ductile Iron Manhole Cover, Professional ...