Product Name: Heavy Duty Ductile Iron Manhole Cover Model NO.: casting Certification: ISO 9001:2008 Surface Treatment: Power Coated Material: Iron Machining: Boring Machine Application: Hardware Sand Core Type: Resin Sand Core Casting Method: Directional Crystallization Type: Clay Dry Sand Dimension: According to Your Drawings Trademark: MINGDA Transport Package: Carton, Wooden Cases Specification: SGS Origin: Hebei China Product Description Ductile Iron Manhole Cover :1. Class:A15, B125, C250, D400, E600 and F900.2. Design Standard: BS EN124:1994.3. Material grade: GGG500/7.4. Test: testing before shipping for the smooth surface and loading.5. Coating: coating black bitumen, or coating as customers' requirements.AvailableDesign:1. Ductile Iron 2. Hinge Type3. Single seal / Double seal 4. Lock5. Closed key hole6. Recessed type 7. Two lifting Key holes8. Double triangular9. Cut-corner DesignProducts showOur factory