Filter-Monster FilterLock Furnace Filter Slot Seal, AZ-FL

FilterLock® is a patented two-piece system designed for use with 1-inch air filters. It eliminates air leakage at the filter slot/door to improve indoor air quality and reduce energy consumption. 

Features: 

• Cover furnace filter slot/door
• Block allergens and other contaminants from entering home including deadly gases like carbon monoxide and radon
• Improve indoor air quality
• Reduce energy consumption
• Magnetically attaches to the duct work
• Two-piece design works with any 1” filter up to 25” long
• Universal one size fits all
• Indefinitely reusable
• Easy to install

What You Get:

• Two (2) magnetic pieces per package

Additional Information:

• Product Dimensions: 25 x 4.8 x 0.1 inches, 2.08 ounces