These round vents are easy to install. They fit into the hole made by a drill type hole saw and are held in plby tabs on the side. They are used for ventilating soffits and eaves, insect cages, display cases and spice racks. Package of 4 vents. Model # RSTBL-100 4" Features: Easy to install Built in insect screen In stock for immediate shipment. Sizes from 1 inch to 4 inch Heavy Aluminum Item Dimensions: 9" L x 2" W x 5" H.
