Check the listing for details. (1 PACK) COMPATIBLE With HUNTER 31911 HUMIDIFIER WICK DRUM FILTER REPLACEMENT. Color: White, Condition: New. Listed at 10.77 USD. AIR FILTER FACTORY BRAND COMPATIBLE With *HUNTER 31911 HUMIDIFIER WICK FILTER 4-1/2" x 20" x 1" DRUM1 Filter Brand new filter to fit many makes and models of filters. FREE SHIPPING IS TO CONTINENTAL UNITED STATES Provided you live in the continental United States, expect you order to arrive at your door in 4 to 7 business days. Rush orders available. For stock filters, there is a 20% return restock fee less shipping. *This NON-OEM replacement wick filter is made in the USA and designed, as well as distributed solely by Air Filter Factory. This is not a Hunter OEM product and is not covered under any Hunter manufacturer's warranty. The Hunter brand name and logos are the registered trademarks of their respective owners. Any use of the Hunter brand name or model designation for this product is made solely for purposes of demonstrating compatibility.