car wash drainage grille surface:gritted,concave,flat,covered UV reisistant,fire retardant,high strength ISO9001:2008 SGS 1)Name:car wash drainage grille 2)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)Size: Mesh(mm)Standard Panel Size(mm)Thickness(mm)Kg Per Sq. ...