4" Round Screened Vent, mill - bag of 4

4" Round Mill Screened Vent - bag of 4 RL-100 4" 4PK These round aluminum vents have louvers and a screen to keep insects out.They are easy to install in wood. Not made for glass, metal or PVC pipe. 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. Fits into a 4 inch round hole. 3.980 si nfa (square inches of net free ventilation area). Bag of 4 vents. Made in the USA. Orders placed by 3 pm MT will ship the next business day.