Product Details: Material: ABS PlasticInner Diameter: 57mm / 2.24"Mounting Diameter: 59mm / 2.32"Fit Hole Diameter: 60mm - 70mm / 2.36" - 2.76"Total Size: 89mm x 35mm / 3.5" x 1.38" (OD*T)Package Content: 4pcs x Round Vent CoverMaterial - Made of ABS plastic material, the round vent cover has high strength, good toughness, and wear resistance.Feature - Easy to install, just plug it directly into the vent hole on the wall or ceiling. Detachable and adjustable design, the middle cover can be easily removed when needed. And you can push the small handle to choose whether to ventilate.Application - Widely used for exhaust and ventilation in bedrooms, bathrooms, kitchens, living rooms, offices and warehouses.Notice - Please confirm the diameter of the vent hole and select the appropriate size vent cover before purchasing.