Insect-Proof Mini Louvers, 4-In., 4-Pk.
4 pack, 4" mill finish round insect proof mini louvers with screen, overall size 4.625", fits 4" hole diameter, 3.5 sqin free area.
4 pack, 4" mill finish round insect proof mini louvers with screen, overall size 4.625", fits 4" hole diameter, 3.5 sqin free area.