Uxcell 304 Stainless Steel Air Vents, 4 Inch, 12pcs Round Louver Grille Vent Cover, Screen Mesh Soffit Air Outlet

Size: Total Size: 145mmx40mm / 5.71 inch x 1.58 inch (D*H) Opening Dia.: 98mm / 3.86 inch Compatible for 4 inch duct or wall hole and the ceiling hole Mounting Hole Dia.: 5mm / 0.2 inch Mounting Hole Distance: 130mm / 5.12 inch)