4" EasyAir Terminator Diffuser

Features: Quick and easy installation with no sharp edges. Can be used for ceiling or wall terminations. Perforated mounting flanges for screws or nails Preset for 1/2 and 5/8-inch drywall. 90° back-stop for a level, uniform installation. Off-set from joist for easy installation of ducting and clearance for application of tape or sealer. 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. Bottom flange for a permanent air seal. V-shaped indentations on bottom edge for centering with previously installed fixtures.