door grille 1.with frame to suit door thickness of 33mm to 48mm. 2.available sizes and colors. 3.material:aluminum door grille ,with an aluminum construction and a backing frame to suit door thickness of 33mm to 48mm,are used in doors where constant air transfer with non-vision is required.Standard sizes:600x150, 600x200, 600x250, 600x300, 600x350, 600x400, 600x450, 600x600.Standard colour: ...