... GGG40/502,Standard: EN1243,Working pressure: A15,B125,C250,D400,E600,F900Manhole cover feature:1, Product information:Manhole cover are manufactured ... ,Grey iron GG253,Designs:A,EN124 A15,B125,C250,D400.E600,F900B,A60005 for casting designC,Major standards designs availableD,As ...