10x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) Wall As long as your duct

As long as your duct opening is approximately 10" × 4" and you have at least 1-1/4" of clearance behind the surface

If the opening is approximately 8" × 6"

The white powder-coated finish stays clean under daily HVAC airflow and temperature changes

use the 10x6 air return grille with pre-filter instead

and remodels where a consistent white register finish matters across several rooms

10x4 Black Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) Wall As long as your ductCHECK SIZE BEFORE PURCHASE: This 10x4 linear slot diffuser fits a 10" 4" duct opening (the hole in your wall, ceiling, or floor not your old cover face). See the full 10x4 sizing guide Fits a 10" 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 interiors and cleaner visual lines. Solid alloy aluminum rust