GRP/FRP/fiberglass manhole cover,used in sewerage,water,electric, ... 23,380,000 and 300 employees. We produce GRP/FRP/Composite manhole cover, rain-grating, gully tops and tree ... stolen and also good in load ability. And GRP/FRP/fiberglass manhole cover,used in sewerage,water,electric,gas,telecommunication ... of products, please feel free to contact us. Supply glass fiber manhole cover BS EN124 STANDARD