4" Round Open Screen Vent, brown - bag of 4 Rain Barrel Vents Not made for glass

Not made for glass

RRBS-100 4" 4PK

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

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

metal or PVC pipe

4" Round Open Screen Vent, brown - bag of 4 Rain Barrel Vents Not made for glass4" 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.