... ,C250,D400,F900 Material: ductile iron Packing: 10pcs in one pallet Surface: bitumen or expoy coat 1. material: grey iron, ductile ... . Tooling and samples time: within 15-30 days8. Packing: wooden pallet, wooden box, steel box, according to the production dimension9. Brand ... supply 11. Certificate: ISO9000: 2008 and others ductile iron manhole covers