[Material] This matte black air vent is made of stainless steel, durable, and strong ability to withstand gravity, not only oxidation resistance, but also more beautiful installation effect. [Design] Air Vent hole with honeycomb design, exquisite round holes conform to the breathable design, small round holes can be dust-proof and not easy to block. [Environment] Circular mesh can make the wind easily flow into the spaces where you are staying, it will giving you a fresh and odorless life and work environment. [Installation] This vent does not require much effort to install, the same diameter hole can be mounted directly. Bottom diameter is 25mm/0.98Inch, outside diameter is 35mm/1.37Inch. [Applications] Suitable for kitchen cabinet, wardrobe, decorative cabinet and offices, meeting rooms, music hall.