... of manhole covers with high quality Class B125, C250, D400, E600, F900 Meeting EN124,BVQI and Australian standarad. Round manhole CoverFeatures ... :1) More than ten years' experience on manufacturing and exporting manhole covers.2) We have ... than 200 kinds of ductile iron and grey iron manhole covers and grates.3) Manufacture --- casting.4) We also ...