Pentek P-250 Under Sink Water Filter Set Replacement filter set for use with the Pentek US-1500 under -sink chemical and lead filtration system (not included) Reduces the presence of 43 different VOCs, lead, cysts, mercury, asbestos, and chlorine taste and odor Lifespan of 1,000 gallons System meets NSF/ANSI standards 42 and 53