OMNIFilter RS16-SS2-S06 Heavy-Duty Cartridge, Single Unit, White Heavy-duty replacement polypropylene spun cartridge, made with 100% pure polypropylene Designed for medium sediment filtration for the whole house Reduces sediment, sand, dirt and rust particles to 1 micron Can be used on chlorinated or non-chlorinated water Fits OMNIFilter BF6, BF7, BF9C, BF35, BF36, BF36C filter housings along with other major brands like 3M, American Plumber, Aqua Pure, Culligan, Cuno, GE, Pentek, Watts, Whirlpool and others