High Quality: It is made of durable and oxidation-resistant stainless steel, which is not only sturdy and durable, resistant to oxidation and oxidation, but also has a beautiful circular grille design. Easy to Install: The circular vent can be installed very easily. They can be installed in holes of the same diameter. They can be perfectly installed on the ceiling or wall. They are also easy to disassemble and clean. Perfect Size: Surface diameter: 4.2 cm / 1.65 inches, opening diameter: 3.5 cm / 1.4 inches, height: 0.7 cm / 0.3 inches. The bottom diameter of this circular vent is very large, which can meet your needs and is easy to use! Unique Design: The stainless steel ventilation holes adopt a honeycomb design, and the delicate round holes conform to the design of the ventilation holes. The small round holes are dustproof, windproof, and not easy to block, creating an odor-free environment for the environment. Wide Range of Uses: Widely used for ventilation and heat dissipation of furniture, often used for ventilation of wardrobes, freezers, storage cabinets, pet fans, wardrobes, shoe cabinets, sundries, etc.