4" Round Open Screen Vent w 1/4" mesh, mill - bag of 4 No Screen vents 5 inch round hole

5 inch round hole

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

4" Round Brown Open Screen Vent

or patio downlights

5" x 4-5/8" stainless steel louvered vent

4" Round Open Screen Vent w 1/4" mesh, mill - bag of 4 No Screen vents 5 inch round hole4" Mill Open Screen Vent, 1 4" mesh bag of 4 RS 104 4"4PK These round aluminum vents have a strong 1 4" screen to keep insects out. They are easy to install. 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. They are designed to go into wood. Not suitable for metal, glass or PVC. 7. 380 si nfa (square inches of net free ventilation area). Bag of 4 vents. Made in