The Pentair EP-20BB 5 Micron Whole House 20 x 4.5 Carbon Block Water Filter is a high-quality water filtration system designed for home use. Made in the United States, this filter is compatible with Pentair and Aqua Optima Evolve systems, featuring a blue color and a flow rate range of 2.5 - 5.0. It comes in a set that includes a filter made of plastic material, with an advertised size of 20 x 4-1/2 inches and a 5 micron rating. This product is a reliable and efficient solution for ensuring clean and purified water throughout your home.