Filter cartridge for SPA: hole size: 150mm; length : 241mm; coarse thread: 46.5mm. Measure your Spa filter and compare with the dimensions of this filter before ordering. Product Compatibility: Replacement for Pleatco PWW50-P3, PWW50P3, Unicel 6CH-940, for Filbur FC 0359, for Waterway Plastics 817-0050 , 25252, 378902, 03FIL1400. Spa filter: 100% polyester fiber, better dust collecting ability, durable polyester makes the cartridge more durable than other choices. The whole spa filter is made up of an unbreakable handle, a high-flow ABS inner core and a thick filter cloth to form a strong and durable body. Powerful filtration performance: thanks to the innovative inchDirt-Lockinginch technology, the fabric contains much more impurities than ordinary fabric. The foldable design of the spa filter increases the filtration area, which can effectively reduce hair, leaves, dust, sediment and sand. Long life: The unique structure of the Trilobal filtration fabric facilitates capturing and removing stains, low pressure difference, large flow rate, long service life, so you can easily wash the filter after use and save costs. Number of pieces delivered: 1