12x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) 12x2 Flush Hidden Damper Lever: The

Flush Hidden Damper Lever: The airflow control lever travels between the slats and never rises above the top surface at any setting

Blends with standard wall and ceiling trim

reducing what reaches your air handler filter

This 4x10 floor return grille is a true surface-mount replacement

Optional screws may be added for extra hold

12x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) 12x2 Flush Hidden Damper Lever: TheCHECK SIZE BEFORE PURCHASE: This 12x4 linear slot diffuser fits a 12" 4" duct opening (the hole in your wall, ceiling, or floor not your old cover face). Neck size: 11 3 4" 3 3 4". Overall face size: 13 3 4" 5 3 4". See the full 12x4 sizing guide Fits a 12" 4" duct opening measure the hole, not your old cover face. Drop in surface mount replacement no drywall, flooring, or duct modification required. Modern minimalist slot design for contemporary