Our 8x4 (9.75"x5.75" Overall Dimensions) high strength magnetic vent cover is designed to connect to your existing vents/ registers in your home. Our elegant design will not only make your home look better, but our electrostatic filter media will let you breathe better. 
Paintable
No Tools Necessary
Filters out allergens and particles 3-10 microns in size
6 Month Satisfaction Guarantee
 
What’s Included:
Crown Vent Magnetic Vent Cover
Crown Vent Electrostatic Filter Media
Universal Mounting Kit for non-metallic existing registers
 
Measuring Instructions:
Measure the overall dimensions of your existing vent/ register. The overall dimensions of a 8X4 will be 9.75"x5.75". 
 
Dimensions:
L: 9.75"
W: 5.75"
D: 0.46"