Usage Tips:Filter delivers safe and clear purified water to inspire the highest sense of happiness. Enjoy your unique SPA time.[Replacement Models] Length: 7 5/8inch; Outside Diameter: 6inch; Top: Circular Handle; Bottom: 1 1/2inch SAE thread; Filtration Area: 45 sq. ft. PLF6CH-940 Hot Tub compatible PWW50P3(Not PWW50P4), Unicel 6CH-940, Filbur -0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400, HTF0245RT. NOTE: This is a compatible spare part and the manufacturers' names and part numbers have been used for reference purposes only.[Long Service Life] Unique Trilobal Filtration Fabric Structure make it easier to capture volume of contiminants. It is also easy to wash/clean to recondition the filter. This filter lasts for 1-2 years when proper maintenance is performed.Colour: white + blueMaterial: plasticPackage Contents:2 x Spa FilterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.