... ,high strength ISO9001:2008 1)Name:high strength plastic grille with gritted surface2)Material:fiberglass&resin&mixture3)Surface:concave ... grate,flat grate,gritted grate,grate with covered surface and surface with figure,grate with covered surface and surface gritted.4 ... UV resistant,Fire Retardant,Impact Resistant,High Strength,Non-Magnetic,Non-Conductive,Non-sparking,Light weight,Easy to Install ...