11-1/4 x 23-1/4 x 1 Electrostatic Washable Permanent A/C Furnace Air Filter (11.25 x 23.25 x 1 EXACT SIZE)

Traps airborne dust and allergens Permanent & Washable - Just hose off and reinstall Replaces disposable furnace filters Lifetime warranty Self-charging electrostatic filter media - does not require electricity