Features: Hemisphere shape can effectively prevent the entry of rain debris, spherical arc can be an excellent reduction of exhaust, can be used year round without rust. Built-in stainless steel grille, effectively isolate debris and dust, to prevent pests into the room, to avoid blocking the channel. Exhaust port is equipped with stainless steel louver, louver is a one-time stamping molding, 45 downward tilt, neat appearance, can effectively play two rain effect, to avoid storms into the rain. Can also guide the smoke emission. Barb design, barbs can be reversed to seize the pipe, so that the tube is not easy to fall off. Uses: Ventilation fan exhaust fan for the external wall exhaust, fresh air, hood exhaust, decorated with the United States and other decorative use. Specification: Material: Stainless steel Types: 70mm, 80mm, 100mm, 120mm, 150mm, 160mm, 180mm, 200mm, 250mm, 300mm Color: Sliver Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Wall Air Vent Grille (without retail package)