12 x 12 " Ceiling Box made of Galvanized Sheet Metal.(Blank Box cut your own hole size)
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12x12" Ceiling box are made of galvanized sheet metal 4" depth.
(Start Collar Sold Seperatly).
The ceiling box is nailed into the attic rafters and plastered or dry walled around the 1/2" flanges.
Room registers are attach to the metal ceiling box.
We strongly recommend using bar-type or curve blade registers for up to 50% more air flow. See our Register and Grille section. Ceiling Boxes come in square openings from 6" to 20" diameter. Ceiling Boxes are used for all types of ceiling applications. Has 1-1/2" plaster ground completly around the box for drywall applications. Size: 12x12 Gauge: 30