New unused vent cover for vents up to 12"x12", exterior size about 13"x13". ALSO INCLUDES A SPECIALIZED CORD FOR INSTALLATION I forgot to include in photos. See also here
https://www.acdraftshields.com/home-winterization/central-air-conditioning-...
Let me know what day and morning/afternoon/evening you'd like to pick up, and I'll put on the porch and email my address, near Teele Square Somerville