Product Name: Ductile Cast Iron Manhole Cover Model NO.: B125 C250 D400 E900 Certification: ISO 9001:2000 Standard: En124 Surface Roughness: Ra0.05 Surface Treatment: Sand Blast Material: Iron Machining: CNC Machining Application: Municipal Sand Core Type: Clay Sand Core Casting Method: Thermal Gravity Casting Type: Clay Wet Sand Machine: Automatic Machine Trademark: YYTT Transport Package: Packing in Wooden Pallet Specification: ductile iron Origin: Handan HS Code: 73251090 Product Description D400 850*850*75 40KGS Clear openning: 600MMthe weight is as per your requirement.Dear Sir,We're aspecial manufacturer and exporter of iron castings in Handan of China.Our mainly products as following:Ductile iron manhole covers and grates.Meanwhile we also produce cast iron pipes and fittings.We have four automatic machine production line, including three vertical production line and one horizontal production line.We have ten MT electric furnace. We also have epoxy paint and baking finish house.Welcome to visit to our factory!Sincerely appreciated and awaiting your kind reply!Best Regards,Derek Lee