OMNI Filter RS15-R-05 Heavy-Duty Cartridge, 1-Pack, White Heavy-duty replacement pleated cellulose-polyester sediment cartridge Designed for medium sediment filtration for the whole house Reduces sediment, sand, dirt and rust particles to 10 microns 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