Filter Cartridge, Proline, Diameter: 4-1/4", Length: 5-7/16", Top: 1-15/16" Open, Bottom: 1-15/16" Open 4Sq. Ft. : P40057

Besides variety of common pool and spa filter cartridges, ProLine also provides special and new products to bring you a better experience when using your pool and spa filtration systems. Designed as direct replacements for manufacturers original cartridges, there are no adapter plates needed. Simply pull out the old filter and replace. All ProLine products are fully in accordance with international standards and high quality.