The Watts Premier RO Pure 4-Pack Filter Kit is a high-quality water filter designed for household use. Made of polypropylene, plastic, and carbon, this 4-stage filter effectively removes contaminants such as arsenic, lead, nitrates, and perchlorate. Compatible with various Watts brand models, this kit includes four filters in white, red, yellow, and blue colors. With a 6-month and 1-year manufacturer warranty, this water filter is a reliable choice for clean and safe drinking water in your home.