Aries (AF-20-1053) 20" x 2.5" Catalytic Carbon FilterThe Aries AF 20 1053 catalytic carbon filter combines chloramine reduction with hydrogen sulfide removal in a high capacity 20" x 2. 5" cartridge designed for whole house and point of entry applications. With a 3,500 gallon capacity and precision engineered media fill, this filter delivers consistent performance in standard 20 inch housings where both chloramine and sulfur odors need to be addressed. SPECIFICATIONS Aries AF 20 1053 Filter Details