3" Round Plastic vent, brown - bag of 4

3" Round Brown Plastic Vent - bag of 4 PLB-100 3" 4PK These round plastic vents are made of high quality UV stabilized wire and cable grade polypropylene. They have a unique polypropylene screen system to keep insects out.They are easy to install in wood. Not made for glass, plastic 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 3 inch round hole. 2.74 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.