Model No.: Mingda-0002
Type: Clay Dry Sand
Casting Method: Directional Crystallization
Sand Core Type: Resin Sand Core
Surface Treatment: Sand Blast
Surface Roughness: Ra1.6
Certification: SGS, ISO 9001:2008
Manhole covers are made of cast iron. These covers need to be heavy so that when vehicles drive over them, they do not become dislodged....