GRP/FRP/fiberglass manhole cover manufacturer,products used in sewerage,water,electric,gas,telecommunication and ... and exporter majored in composite products such as FRP/ GRP Manhole Cover, Grating, Tree Grille, etc in China, Hunan Timelion Composite ... Tested approved.If any questions, please feel free to contact with us.looking forward to your reply. FRP light duty manhole covers with frame