Description：Material: This air vent is made of ABS plastic, durable, impact-resistant, scratch-resistant, moisture-resistant, corrosion-resistant, nontoxic and odorless, not only has oxidation resistance but also has a more beautiful installation effect. No screws included.Advanced Advantage: The ABS plastic air vent is sturdy but lightweight, has smooth edges, simpler and safer for installation.ABS plastic mesh design, the air flows easily, and the small strip exhaust port can block dust, not easy to block.Wide Application: This air vent is used in offices, meeting rooms, auditoriums, music halls, bedrooms, kitchens, bathrooms, storage rooms and anywhere else air needs to move.How to Install: It is recommended to wear gloves during installation when installing push the cover into the mounting hole, it will snap firmly and not easily loosen.Note: Before purchasing these round vent covers, carefully measure the diameter of the mounting hole. If the mounting hole is too large or too small, the installation of these round soffit vents will fail.Specification:Item Weight: 27.2g/‎0.96 OzPackage Dimensions：Outside Diameter: 35mm / 1.4in;Bottom Diameter: 40mm / 1.5in; Mounting Height: 11mm / 0.4in; Color： BrownMaterial： ABS PlasticPackage Content: 40Pcs of Round Soffit Vents