The windproof construction prevents wind from blowing into the rain and wind during strong winds, while providing sound insulation performance. Wall stain-resistant construction. Uses rust-resistant super stainless steel. Note: Do not use for high airflow ventilation aimed to reduce negative pressure inside the room. ■Product Specifications Color: Black Applicable Pipe: SU100 (inner diameter φ100) Dimensions: A/170, B/140, C/190.6, D/96.4, E/94.2, F/138.6, G/85, H/53.6, J/97 Finish: Acrylic Baked Coating Material: Body/Hood/Super Stainless Steel (NSS445M2) 0.02 inch (0.6 mm) Part: Stainless steel (SUS304) t = 0.02 inches (0.5 mm), Effective Ventilation Area: 4.7 inches (12 cm) *Maintenance is required to prevent product from rusting. ● Product photos are printed color, so the actual color may differ slightly from the images. Please note that the specifications and price may be altered (Manufacturer) Kyowanasta Co., Ltd.