AIR VENT SPECIFICATION: 6 Inch Round Soffit Vent, panel diameter 180 mm / 7 inch, bottom diameter 148 mm / 5.9 inch, height 50 mm / 2 inch, applied to 6 inch circular pipe/ducting hose/wall air outlet etc. MATERIAL: Wall Air Vent Hood is made of 304 Stainless Steel with fine workmanship, , anti-rust and . LOUVER DESIGNED: Louver Grille Cover adopts build-in Screen Mesh, can isolate things to provide you a better . EASY INSTALLATION: Adjusting the regulating valve of soffit buckle on the vent cover side to prevent drop, and come with two screws for fixing the panel, can be perfectly installed on the ceiling or wall, also very easy to disassemble for cleaning conveniently. WIDELY APPLICATION: Ventilation Duct Cover can be used in indoor exhausting, suit for bathroom vents & extractors, air conditioning units, kitchen fans, all tumble dryer vent pipes / hoses and so on. Specification: Type: Louver with build-in screen mesh Material: 304 Stainless Steel Color: Silver Panel Diameter: 180 mm / 7 inch Bottom Mount Diameter: 148 mm / 5.9 inch Height: 50 mm / 2 inch Package Contents: 4 x Round Air Vent Grille 8 x Screws 8 x Expansion tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.