CW F Polypropylene String-Wound, 2-5/8'' x 9-7/8'', (Fine). Single unit.

Sediment Filter Cartridge, CW / WP Series
CW and WP Series cartridges are manufactured from a durable polypropylene cored that is wound around a rigid polypropylene core. They are an economical solution to reduce fine sediment, including sand, silt, rust and scale particles.
CW cartridges are very economical and wound is a standard pattern around the core.
WP cartridges are wound in a precise pattern around the core providing a greater surface area. The result is a higher dirt-loading capacity and greater efficiency than standard wound cartridges like the CW.

CW and WP cartridges are suitable for municipal and well water as well as many industrial fluids.

Polypropylene Wound Sediment Cartridges:
5, 20, 50 micron (nominal) (CW)
5, 30 micron (nominal) (WP).