Compatible to Intelifil (IF-SM-KDF85020B) 20"x4.5" 40,000 Gal. KDF-85-GAC Hydrogen Sulfide & Iron Reduction Filter by IPW IndustriesThe IPW Industries compatible replacement for Intelifil IF SM KDF85020B combines KDF 85 media with granular activated carbon in a 20"x4. 5" format to target iron and hydrogen sulfide while delivering 40,000 gallons of filtration capacity. This dual media cartridge fits standard big blue housings and handles the toughest well water challenges including metallic taste, rotten egg odor, scale, and microbial growth. SPECIFICATIONS Core Performance Data