Honeywell HWF101AB Replacement Filter for Filtration System HWB101 series 45% carbon, 30% resin, 25% plastic Imported ENJOY POTABLE WATER: Tested and certified by WQA under NSF/ANSI Standard 42 for the reduction of chlorine (taste and odor); it also reduces particulates (based on manufacturer testing). EXCLUSIVE USAGE: These filters are to be used only with Honeywell Filtration System model HWB101 NO MORE ADDITIONAL PARTS TO BUY: Included in the box are both the resin and carbon filter that need to be replaced at the same time LONG TERM FILTER: Features a filter life of 132 Gallons or approximately 6 months, depending on water quality and usage. 100% RISK FREE GUARANTEE: Our main goal is to provide the most effective and friendliest customer service. This is why we stand 100% behind our products, offering in-home and office tech support in over 220 cities across the US . Our filters have a limited manufacturers warranty against any defect as a further commitment to your satisfaction.