Compatible to Intelifil (IF-SM-KDF85010B) 10"x4.5" Big Blue 2 Lb KDF-85-GAC Iron-Hydrogen Sulfide Removal Filter by IPW IndustriesIPW Industries Compatible with Intelifil IF SM KDF85010B 10"4. 5" Big Blue KDF 85 GAC Iron & Hydrogen Sulfide Removal Filter Specialty cartridge combining KDF 85 and coconut shell GAC for targeted iron, HS, and taste & odor control in whole house and point of use applications 2 lb KDF 85 media blend 20,000 gallon capacity Compatible with standard 10" Big Blue housings Watts approved design This filter addresses the two most common well water