4" Round Open Screen Vent, brown - bag of 4 Rain Barrel Vents The louvers are closely spaced

The louvers are closely spaced to prevent wasps or other insects from entering

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

RWT-200 3"4PK

They are held in place by #6 screws

4" Round Open Screen Vent, brown - bag of 4 Rain Barrel Vents The louvers are closely spaced4" Round Brown Open Screen Vent bag of 4 RBS 100 4" 4PK These round aluminum vents have 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. 7. 380 si nfa (square inches of net free ventilation area). Bag of 4 vents. Made in the USA.