P-SR300 Proline | Filter Cartridge Set, Proline, S7M120, Inner/Outer Kit, inner: 8-3/4" x 25-1/4", Outer: 16-1/2" x 18-3/4", 300sq ft $573.61 Cartridge diameter -8-3/4" Cartridge length - - 25-1/4" Top configuration -Closed, Bottom configuration -Closed Square footage -300 Add to Cart