METAL TOP REGISTER BOX WITH COLLAR - NO INSULATION

1" perimeter flange provided for easy installation.
Design includes 1/2" drywall lip and rounded corners for added safety.
Opening 1/4" oversized to accommodate register/grille.
Dual Bead design for added strength.
Black diffuser board coated with EPA registered antimicrobial protective acrylic agent along air stream side.
Collar installed with expansion lock and then sealed air tight with hot melt glue.

Body:
30 Gauge Hot-dipped Galvanized Steel
Perimeter Flange:
30 Gauge Hot Dipped Galvanized Steel
Collar:
30 Gauge Hot Dipped Galvanized Steel