4" Round No screen vent - tab style, black - bag of 4

4" Round Black No Screen Vent, tab style - bag of 4 RBLT-200 4" 4PK These round vents are made of aluminum with closely spaced louvers to keep insects out. They do not have a screen. They are easy to install. They fit into the hole made by a drill-type hole saw  and are held in place by 6 tabs on the side of the vent. No nails or screws are needed. Note: These are made for thin materials like metal, glass or plastic. They do not work well in wood. The tabs need to be bent over from the rear. Fits into a 4 inch round hole. 3.682  si nfa (square inches of net free ventilation area) Bag of 4 vents. Made in the USA. Orders received by 3 pm MT will ship the next business day.