Product Information
- 4" High x 3" High Collar
- 26 Gauge Galvanized Steel, Single Wall with No Insulation
- Built with standard plaster ground flange all the way around the square portion.
- Connects a 14" Round Duct to a 16" x 16" Diffuser or Register Vent.
- The ceiling box is nailed into the attic rafters and plastered or dry walled around the flange called plaster ground.