AfterMarket Idylis Carbon Pre-Filter 4-Pack; Filter A, Fits Idylis Air Purifiers IAP-10-100, IAP-10-150 4-Pack of Carbon Activated Filters Made in the USA from BulkFilter Brand Carbon filter material Use with Idylis Air Purifiers: IAP-10-100 and IAP-10-150 Each Carbon filter measures 9.75"x7.75"x.2" Traps more dirt than standard carbon filters & Helps reduce common household odors