FRP,GRP,SMC Manhole Cover, Gully Trap 1.BS or EN 124 standard; 2.Anti Corrosion of acid, ... glass,resin and quartz.It is strictly produced according to BS EN 124 standard.Now we can provide A15,B125, ... sewer grate surface accordingly.FRP Manhole Cover for Drain, Rain, Cable ProtectionBack ViewThe advantages of our frp/grp sewer grate:1 ... in the surface FRP Manhole Cover for Drain, Rain, Cable Protection