... -7 2.standard:EN124 3.pressure:A15,B125,C250,D400,E600,F900... Cast iron manhole coverSPECIFICATION Class B125Class C250Class D400Long ext. Frame Diam ... .Material a) Ductile Iron GGG500-7 & 400-12 b) Grey Iron GG202. Designs . a) EN124 A15, B125, C250, D400, E600 and F900 b ...