Three 5 micron 4.5 x 10 inch water filters. These replacement cartridges are an ideal choice for the value conscious consumer. Performance is commensurate to the competition at a fraction of the cost. Proudly made in the U.S.A. This item from CFS is manufactured from a durable polypropylene cord that is wound around a rigid polypropylene core. The large exposed surface area gives this cartridge impressive dirt-loading capacity. Thus it can perform longer and more efficiently. The cartridge effectively removes dirt, rust and sediment down to 5 micron nominal. The 20 gallon per minute flow rates allow for residential, commercial and industrial applications. These cartridges have an industry universal dimension of 4.5 inch x 10 inch makes them compatible with filter housing manufacturers such as GE (GXWH35F, GXH30C, GXWH40L), Whirlpool (WHKF-DWHBB), Cuno(AP801), Sears/Kenmore(38448), Culligan(Big Blue) and Ametek (Big Blue), among others. Any brand names or logos are the registered trademarks of their respective owners. Any use of any brand name or model designation for this product is made solely for purposes of demonstrating compatibility.