Duct Outlet 12\ x 12\ Ceiling Box, w/ 12\ Round Collar - Connects Register Vent and Diffuser HVAC
- 26 Gauge Galvanized Steel, Single Wall with No Insulation.
- Built with standard plaster ground flange all the way around the square portion..
- Connects a 12" Round Duct to a 12" x 12" Diffuser or Register Vent..
- The ceiling box is nailed into the attic rafters and plastered or dry walled around the flange called plaster ground..