Buy from Amazon.com : http://best.waitmejapan.com/?asin=B0136YA7BI

20x25x1 Electrostatic Washable Permanent Ac Furnace Air Filter Reusable Gold Frame

Product Description :
Traps 95 of airborne dust and allergens
Permanent Washable - Just hose off and reinstall
Replaces disposable furnace filters - Lifetime USA Warranty
Made in USA with a premium quality extruded aluminum gold anodized frame with a durable and attractive finish
Self-charging electrostatic filter media - does not require electricity