Package includes: 20 circular flat vents. Material: Made of high-quality pure stainless steel; strong and durable, not easy to rust, no fading, smooth surface, high-end beautiful and generous, multi-process, long-term use is still bright, and the edges are natural and feel good. Upper diameter: 60mm; Lower opening diameter: 53mm; Thickness: 9mm. Installation design: fashion and simple style; When installing, directly push the buckle of the inner diameter of the exhaust hole slightly outward, and fix the exhaust hole in the long hole. Dust and foreign matter are not easy to block, all kinds of furniture can be installed at will, practicality is strong, and it can be used anywhere. Wide applications: Suitable for household cabinets, shoe cabinets, wardrobes, bookcases, etc. It can be used anywhere, keep it dry, ventilated, breathable and moisture-proof. The honeycomb round hole design can provide ventilation without opening the cabinet door.