4" Round Screened Vent, brown - bag of 4 Plugs Unit features a two piece

Unit features a two piece twist locking interchangeable screen vent cap

380 si nfa (square inches of net free ventilation area)

CPR-100 4" Round Copper Vent

2" Round Black No Screen Vent

970 si nfa (square inches of net free ventilation area)

4" Round Screened Vent, brown - bag of 4 Plugs Unit features a two piece4" Round Brown Screened Vent bag of 4 RLB 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. 500 si nfa (square inches of net free ventilation area). Bag of 4 vents. Made in