HVAC Plenum Ceiling Box 14x 14 X 12 (14"X14" Square to 12" Round) with Drywall Flange - Connects to Vent Register Diffuser, Galvanized Steel Metal C-Box Duct, Airflow Conditioning Ceiling Registers
Ceiling Register Box for home HVAC Duct Vent. 30 gauge sheet metal construction with drywall flange. Works with metal duct pipe or felxible ductwork. Once it's in position can be sealed with duct sealer.