4" Round Black Plastic Vent - bag of 4
PLBL-100 4" 4PK
They are easy to install in wood. Not made for glass or 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.
4.80si nfa (square inches of net free ventilation area)
Bag of 4 vents.
Made in the USA.
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Our Canadian customers may have to pay import fees.