Features: With a drawcord design at the bottom, the turbine roof dust cover is easy to install, and you can it by tightening the drawcord to prevent it from being blown by the wind.Made of oxford cloth, the roof ventilator cover is sturdy and practical, so you can give it as a gift to neighbors, colleagues, relatives, , warm through winter.Specifications:Size: about 30 x 45cm in diameter and widthMaterial: Oxford clothcolour: BlackPackage Contents:1 set x Turbine roof vent covers(4 Pcs)Only the above package content, other are not included.Note:Light reflection and different displays may cause the color of the item in the a little different from the real thing.The measurement allowed error is +/- 1-3cm.