FRP Fittings Inc. mainly offers FRP fittings including couplings stub flanges blind flanges 90 degree elbows U-vents and manways in a variety of resins and sizes. We also offer FRP grating in a wide range of materials grits and colors. FRP grating is manufactured by interweaving continuous wetted fiberglass strands in a mold with thermosetting resin. Typical applications include floor systems walkways work platforms stairs ramps trench covers and catwalks.