[Size]: Replacement massage tub filter element, opening: 150mm; length: 210mm; coarse thread: 38mm. Measure your filter at return water before ordering and compare it with the size of this filter[Applicable model]: replace Pleatco PWW50-P3, PWW50P3, Unicel 6CH-940, Filbur FC 0359, Waterway Plastics 817- 0050, 03FIL1400, 25252, 378902[Sturdy and durable] The whole filter adopts unbreakable handle, high-fluidity ABS inner core. and a thick filter fabric to form a robust and durable body, equipped with of strong resistance and resistance to corrosion at; high temperature.[Foldable Design]: More folds of the filter element means increased capacity. improved filtering. The inner mesh in laminated polyethylene to three layers is covered with a top layer resistant to weather and water. the tear, which can keep the pleats clear, well-defined and evenly spaced[Long life]: the unique structure of the filter fabric facilitates the capture and the stain removal. Therefore, you can easily clean the filter after use. The filter has been tested and can be used long with regular cleaning. Use this filter with pleasure.Features: Advanced filter; : A filter with a lot of fibers can retain more dirt. Free Flow Core technology: better fluidity, increased filter life. Longer life: lower cleaning frequency and longer life. Characteristics of the filter: Material: polyester fibre. Outside diameter: 150 mm. Thread: 38.1mm. Height: 210mm. Water temperature: 2540. Pressure: 35Mpa. Replacement cycle: 4-6 months. Replacement model: Replacement spa filter, Unicel 6CH-940, Pleatco PWW50P3, PWW50-P3, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902 and 03FIL1400. Note: These filters do not apply to the new Canadian spa (Chinese spa), only the original Canadian spa (Pacific spa)."