https://www.acehardware.com/departments/heating-and-cooling/chimney-and-flue/stove-pipe-caps/47706
Imperial Galvanized Steel Stack End Cap Mfr# GV0022-C - Ace Hardware
Effectively terminate a rectangular duct run with this Imperial Rectangular Duct End Cap. The 3" x 10" duct cap is used to block off the main trunk duct within...
galvanized steelend capimperialstack