uxcell 10 Pcs 42mm Diameter Hardware Stainless Steel Round Air Vent Louver Product Name : Air Vent;Design : Mesh Hole, Round Shape;Color : Silver Tone Material : Metal;Each Hole Diameter : 3mm / 0.118" Upper Diameter : 42mm / 1.65";Bottom Diameter : 35mm / 1.4" Air Vents Diameter : 30mm / 1.2";Total Size : 42x 9mm / 1.65" x 0.35" (D*H) Net Weight : 45g;Package : 10 x Air Vents