FilterLOCK Furnace Filter Slot Cover

SKU: FilterLOCK
MPN: AZFL-25
$15.99
FilterLOCK FEATURES: Year round savings and protection Blocks allergens and pollutants One-size-fits-all standard air filters - includes two seal pieces that overlap Easy-on / easy-off (reusable) Magnetically attaches to metal duct Saves energy - reduces utility bills Dimensions - 4-3/4" Wide - Covers slots up to 25" Long
http://www.filtersusa.com/Filter-Lock/index.cfm
Products specifications
Model Number FilterLock