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4" Round Plug - mill color - bag of 4
030si nfa (square inches of net free ventilation area)
5" White Open Screen Vent
They are easy to install into a 4" hole made by a drill-type hole saw
4" Round Brown Open Screen Vent
3" Round No screen vent - tab style, black - bag of 4 Rain Barrel Vents 4" Round Plug - mill3" Round Black No Screen Vent, tab style bag of 4 RBLT 200 3" 4PK These small round vents are made of Aluminum. The louvers are closely spaced to keep insects out. They do Not have a screen. They are easy to install. They fit into the hole made by a drill type hole saw and are held in place by 4 tabs on the side of the vent. No nails or screws are needed. Note: These are made for thin materials like metal or glass or plastic. They do not work well in