These small round vents 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. They are used for ventilating soffits, display cases, insect and lizard cages. Package of 4 vents.
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Package of 4 vents.
Easy to install in wood. Not made for metal, glass, or PVC pipe.
Fits in a 3 inch round hole.
For soffit ventilation, display cases, spice racks, insect and reptile cages.
Specification sheet is at http://mflouver.com/content/rs-rws-rbls-rbs-series-louvers