Specification Brand : Arpisziv BulletPoint1 : Package Include:4*Spa Filters BulletPoint2 : Replacement Part NO.:Pleated PWK35B/Filbur FC-3921/Watkins 1642301-1, 78161, 78286 BulletPoint3 : Dimensions:Length: 14", Outside Diameter: 6-3/8", Top /Bottom Opening: 2" BulletPoint4 : Highly efficient filtration materials can effectively filter impurities in the water such as hair, sand, moss, leaves, dust. Provide you the clean, transparent and healthy water.Lower pressure and higher flow rates can protect the pump, and the filtration effect will be better than others. BulletPoint5 : You can use a water gun to clean the spa filter, the whole process is very simple and fast. Of course, if properly maintained, the service life will be longer than your expectation. Color : White ExternallyAssignedProductIdentifier : 3504461621905 ItemName : Arpisziv PWK35B Hot Springs Spa Filter Replaces Filbur FC-3921 Watkins 1642301-1, 78161, 78286 Pleated Filter Cartridge ItemPackageDimensions_Height : 47.371 centimeters ItemPackageDimensions_Length : 39.6748 centimeters ItemPackageDimensions_Width : 41.529 centimeters ItemTypeKeyword : swimming-pool-cartridge-filters ItemTypeName : Spa Filter Manufacturer : Arpisziv ModelName : Spa Filter ModelNumber : PWK35B NumberOfBoxes : 1 PartNumber : PWK35B PowerSourceType : fuel_powered ProductDescription : Dimensions: Length: 14" Outside Diameter: 6-3/8" Top /Bottom Opening: 2" Filtration Area: 35 sq.ft SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1