Magnetic Vent Covers 4 PCS - HVAC Premium Anisotropic 1.5mm Optimal Thickness - 12" X 5.5" - for Wall, Floor, Ceiling Vent Covers - Trap & Seal Air tool belt Rigid Design - Noise Free

Rigid Design - Noise Free Components - No Vibrating Louvers Etc

+ Product Details Size - 12"w X 18"h X 2"d (for duct opening measurement only)

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 14" OR 14" x 28" duct opening (measured at the opening)

Actual Filter Size – 27 3/4"w x 5 3/4" x 1"

Magnetic Vent Covers 4 PCS - HVAC Premium Anisotropic 1.5mm Optimal Thickness - 12" X 5.5" - for Wall, Floor, Ceiling Vent Covers - Trap & Seal Air tool belt Rigid Design - Noise Free+ Product Details Cut into any shape & size With an original dimension of 12" X 5. 5" inch, you can cut or trim your vent cover to more precisely fit your air vent. Strongest Magnets Our anisotropic magnetic vent covers provide the strongest magnetization and seal to your register grilles, vents or diffusers and can even be installed on ceiling vents unlike most magnetic vent covers in the market today. Thickest Vent Covers Our magnetic vent covers