4" Round Open Screen Vent, mill - bag of 4 Stainless Steel Vents 1/4" mesh - bag of

1/4" mesh - bag of 6

The louvers are spaced closely enough to keep out most insects

These small round plugs are made of Aluminum

These flush mount stainless steel vents are are held in place by #6 screws

4" Round Open Screen Vent, mill - bag of 4 Stainless Steel Vents 1/4" mesh - bag of4" Round Mill Open Screen Vent bag of 4 RS 100 4" 4PK These round aluminum vents have a screen to keep insects out and 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. 7. 380 si nfa (square inches of net free ventilation area). Bag of 4 vents. Made in the USA.