4" Round Open Screen Vent - tab style, mill - bag of 4

4" Round Mill Open Screen Vent, tab style - bag of 4 RST-100 4" 4PK These round aluminum vents have a screen to keep insects out, or in, depending on your application. They are easy to install. They fit into the hole made by a drill-type hole saw  and are held in place by 4 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.7.380 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.