MODEL #: 4-309
$ 11.11
MODEL #: 8-309
$ 9.22
MODEL #: 5-309
$ 9.00
MODEL #: 6-310
$ 8.23
MODEL #: 6-309
$ 7.96
End caps seal off unused duct openings to prevent air loss and keep debris out of the system. They press-fit or snap onto the end of round or rectangular duct sections.