... 4.Aganist theft 1. SMC Composite Manhole Cover Features:1. Against theft ---JINMENG SMC manhole cover is non-metallic, non-conductive ... s existing moulds load capacity are A15, B125, C250, D400, E600.3. Free design---Sucs as Color, Logo, ... more competitive price--- the weight of composite manhole cover especially SMC manhole cover is lighter. The composite manhole cover is more convenient to transport, ...