Pleatco Filter with Free-Flow Core Technology for the purest water quality and durability Replaces OEM Filter Brands and Part Numbers: ONYX SPAS: 84-92028, 8492028 Measurements: Length: 11-7/8" Outside Diameter: 6-1/8" Top Opening: 2" Bottom Opening: 2" # Total Sq. Ft. 50 Other popular brand part numbers Unicel Filter - C-6405, C6405 Filbur - FC-3063, FC3063 Aquakleen - AK5002, AK-5002 Manufactured by Pleatco, guaranteed highest quality or your money back Pleatco Part number: POX50, POX-50 UPC Code: 090164550008