Buy from Amazon.com : http://cheap.waitmejapan.com/?asin=B0136XN4RS
16x20x1 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