uxcell 50 Pcs Stainless Steel 35mm Bottom Dia Round Mesh Hole Air Vent Louver Product Name : Air Vent;Design : Mesh Hole, Round Shape Color : Silver Tone;Material : Stainless Steel Each Hole Diameter : 3mm/0.12";Upper Diameter : 42mm/1.7" Bottom Diameter : 35mm/1.4";Thickness : 10mm/0.39" Net Weight : 298g;Package : 50(+-2%) x Air Vents