4" Diffuser Sleeve (Terminator)

Quick and easy installation with no sharp edges. | Can be used for ceiling or wall terminations. | Preset for 1/2 and 5/8-inch drywall. | 90° back-stop for a level, uniform installation with bottom flange for a permanent air seal. | Duct-Stop-Point ensures no screws penetrate the collar and impede the insertion of the grille. | A rigid bottom flange guarantees the drywall router tool conforms to the circular opening. | V-shaped indentations on bottom edge for centering with previously installed fixtures. | Off-set from joist for easy installation of ducting and clearance for application of tape or sealer.