Allisfresh MA-01CW Air Cleaner Purifier Replacement Filter Compatible with Ibuki C102 MA-01CW Air Cleaner Purifier and Okaysou AirMic4S. Contains 2 Replacement Filter. Replace Filters Every 6 Months. Help Keep Your Machine Running At Its Best. This is not an OEM product. The brand names and logos are the registered trademarks of their respective owners. Any use of the brand name or model designation for this product is made solely for purposes of demonstrating compatibility.