These small round vents are made of . 020 gauge aluminum. They have insect screens and are easy to install. They do not have louvers. They fit into the hole made by a drill-type hole saw and are held in plby tabs on the side of the vent. No nails or screws are needed. These vents are made for sheet metal or glass and do not work well in wood. 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. Available in sizes from 1 inch to 4 inches. Colors available are Black, Brown, Mill, and White. Model # RSTBL-100 1" Features: Easy to install Built in insect screen In stock for immediate shipment. Sizes from 1 inch to 4 inch Heavy Aluminum Item Dimensions: 4" L x 1" W x 3" H.
