KX MATRIKX Pb1 10-Inch Length Extruded Carbon Block Filter Cartridge, 1-Pack Reviewhttp://tinyurl.com/nldg7yl KX MATRIKX Pb1 10-Inch Length Extruded Carbon Block Filter Cartridge, 1-Pack Lead, Cyst and Turbidity Reduction Based on NSF/ANSI Standard 53Outstanding Chlorine Taste and Odor Reduction Based on NSF/ANSI Standard 42Graded-density filtration + high dirt holding capacity. Photo is of EXACT itemExtruded activated carbon provides several times greater life than molded filters. MADE IN USA