Superfrp gratings are light in weight and high in strength, we can produce all kinds of FRP/GARp gratings to meet you demands. Superfrp molded grating is an integral construction one-piece fiberglass roving reinforced unsaturated polyester resin grating. The thickness of FRP/GRP,fiberglass grating reffers to its actual thickness, we have 23mm,25mm, 30mm, 38mm ,40mmand 50mm ,60mmfor you to choose. ...