... housing,excellent quality,exquisite appearance, 70 years without rotting. TKBHOME S350M872 S Series of Two-way Ventilation fan DescriptionImported aluminum with ... ))Weight(kg)S200M871220200/170100/7632/2515S350M872220350/170155/7236/2523 TKBHOME S350M872 S Series of Two-way Ventilation fan