Stainless Steel Round Mesh Hole Air Vent Louver 64mm Upper Dia 10 Pcs Product Name : Air Vent;Color : Silver Tone Material : Stainless Steel;Hole Diameter(Each) : 4mm/ 0.16" Upper Diameter : 64mm/ 2.5";Bottom Diameter : 53mm/ 2.1" Total Size : 64 x 11mm / 2.5" x 0.43" (D*H);Net Weight : 146g Package : 10 x Air Vent