Additional Details ------------------------------ Product description: These small round vents are made of high quality .020 gauge aluminum. They have insect screens and are easy to install. They fit into the hole made by a drill-type hole saw and are held in place by knobs on the side of the vent. No nails or screws are needed. They are used for a wide variety of ventilation, from eave and soffit ventilation to insect cages, display cases, spice racks, electrical and mechanical boxes, cargo crates, etc. These vents are designed for use in wood and do not work well in metal. Available in sizes from 1 inch to 6 inches. Colors available are Black, Brown, Mill, and White. Package of 6 vents.