Filter Cartridge, Sundance, Diameter: 7-1/2" , Length: 14-3/4" , Top: Open Bottom: Open, 2.62" MPT, sq ft 65 : 6540-481

Sundance 65 - 6540-481 Filter Cartridge Replacement for Sundance Spas. Cartridge filters have a much larger filtering area due to their design and construction. The pleats on a cartridge allow the filter to run at a lower pressure. As a result, the back pressure on your pool and spa pump is reduced thereby increasing the lifespan of your equipment. A pleated cartridge can trap debris as small as 10 to 15 microns (not visible to the un-aided human eye).