Replacement Post-Filter Sleeves by LifeSupplyUSA, Compatible with all IQAir GC Series Air Purifiers including GC MultiGas, GC AM, GC ChemiSorber and GC VOC. This is a high quality replacement part by LifeSupplyUSA, exclusively for sale by LifeSupplyUSA. We are not affiliated with IQAir. Any brand names or logos are the registered trademarks of their respective owners. Any use of any brand name or model designation for this product is made solely for purposes of demonstrating compatibility.