Dimensions: surface diameter: 42mm, opening diameter: 35mm, height: 8mm. Suitable for most sizes and easier to use. Material: Made from durable and rustproof stainless steel material which is not only strong and durable, rustproof and strong antioxidant, but also has a beautiful circular grid design. Ventilation: The breathable mesh can reduce the odor in the cabinet, prevent the entry of foreign objects, and protect the objects in the cabinet. Stylish and fashionable, suitable for all lifestyles. Stainless steel mesh, honeycomb design, exquisite round holes with breathable design, small round holes can be dustproof and not easy. Easy installation: Round ventilation holes can be installed quickly and easily, are very easy to install, and holes of the same diameter can be installed directly. Application: Porous mesh ventilation holes are normally used for ventilation cabinets, lockers, cabinets, shoe cabinets, etc. Suitable for offices, conference rooms, concert halls, auditoriums, etc. where porous mesh ventilation holes are needed.