AfterMarket Idylis B Carbon Pre-Filter 4-Pack, Fits Idylis Air Purifiers IAP-10-125, IAP-10-150, Model # IAF-H-100B, IAFH100B 4-Pack of Carbon Activated Filters Made in the USA from BulkFilter Brand Carbon filter material Use with Idylis Air Purifiers IAP-10-125, IAP-10-150 Hepa filter IAFH100B Filter B Each Carbon Pre-Filters measure 6.75"x7.75"x.2" Traps more dirt than standard carbon filters & Helps reduce common household odors Direct Fit replacement carbon pre-filter