Water Filter Cartridge Replacement Set includes KX MATRIKX CTO 10-Inch Carbon Block Filter Cartridge and Pentek P5 5 Micron Sediment Cartridge Matrikx KX CTO 32-250-125-975 with Pentek P5 Sediment filter cartridge for extra long life Outstanding Chlorine Taste and Odor Reduction Based on NSF/ANSI Standard 42 and WQA Gold Seal certified Pentek P5 Sediment Cartridge can be used as a pre filter for extra high dirt holding capacity and longer life Filter consists of activated carbon particles fused into a uniform block with enhanced adsorptive capacity and efficiency MADE IN USA Manufactured using FDA-compliant materials