SK Integrated louvres, Sheet steel, WHD: 330 x 110 x 8 mm, Integrated Louvers, Carbon steel, RAL 7035, Assembly components, 330 mm, 110 mm, 8 mm, 13 in, 4.33 in, 0.31 in, 73269098, 4 pc(s), 3.457 lbs, 4028177165274, For ventilation by convection, easily retro-fitted using 4 screws.