4" Round No Screen vent, white - bag of 4 Open screen w 1/8 mesh 6" Round Brown No Screen

6" Round Brown No Screen Vent - bag of 2

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

They have a screen to keep insects out

RS-104 2"6PK

2" Round Open Screen Vent w 1/8" mesh

4" Round No Screen vent, white - bag of 4 Open screen w 1/8 mesh 6" Round Brown No Screen4" Round White No Screen Vent bag of 4 WNS 100 4"4PK These round aluminum vents 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. The louvers are closely spaced to prevent wasps or other insects from entering. They do not have screens. Fits into a 4 inch round hole. 3. 682 si nfa (square inches