12x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) 4 Slot This 12x12 aluminum vent cover

This 12x12 aluminum vent cover is designed to fit a standard 12" × 12" duct opening (also listed as a 12x12 wall register or 12 x 12 vent cover)

and no remodeling

If the opening is approximately 10" × 10"

choose a dedicated 10x4 air return grille with pre-filter instead

12x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) 4 Slot This 12x12 aluminum vent coverCHECK 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). 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 interiors and cleaner visual lines. Solid alloy aluminum rust