Idylis Carbon Pre-Filter 4-Pack; Filter A, Fits Idylis Air Purifiers IAP-10-100, Iap-10-150 4-Pack of Carbon Activated Filters Use with Idylis Air Purifiers: IAP-10-100 and IAP-10-150 Made in the USA Traps more dirt than standard carbon filters & Helps reduce common household odors Aftermarket product meets or exceeds OEM specs