Made in the USA with Walmart. Sold by Walmart at com, the origin of the display. DISCLAIMER: Check manufacturer information for important country of origin information is accurate and consistently available. Regardless of updated, accurate country of origin data please refer to the product packaging or manufacturer recommended information. This Pentaerythritol p-250 a under-sink filter set is suitable for use as a replacement filter set for the Pentaelythritol us-1000 under-sink chemical properties and lead filtration system (not included). of 43 different mercury, asbestos, MTBE, volatile organic chemicals (VOCs), lead, cysts, chlorine taste and odor, with a life span of 1,000 gallons. Meets the system U.S. Sanitary Foundation / NSF / ANSI Standard 42 chlorine taste and odor reduction and particulate class I and standard 53 reduction asbestos, cysts, lead, mercury, turbidity, MTBE, and VOCs. This under-sink filter set is a residential and commercial drinking water filtration. Water filters have been a semipermeable barrier, adsorption, or biological treatment of water by unwanted particles and microorganisms.