Size:Top Diameter: 42mm/1.65in, Bottom Diameter: 35mm/1.38in, Thickness: 7.5mm/0.3in. Material: Durable stainless steel material. This vent is very easy to install, with the same diameter hole can be mounted directly. Stainless Steel Mesh Hole With honeycomb design, round holes conform to breathable design, small round holes can be dustproof and not easy to block. Design: Mesh hole, round-shaped, convenient, a variety of furniture can be randomly installed, available everywhere, used to install in places such as offices, conference rooms, auditoriums, concert halls.

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