Pleatco Filter with Free-Flow Core Technology for the purest water quality and durability Replaces OEM Filter Brands and Part Numbers: Viking Spas: Sonfarrel 40-220042, 40220042, SC-3500, SC-2200 Measurements: Length: 11-7/8" Outside Diameter: 5" Top Opening: 2-1/8" Bottom Opening: 2-1/8" # Total Sq. Ft. 35 Other popular brand part numbers Unicel Filter - C-4332, C4332 Filbur - FC-1613, FC1613 Aquakleen - AK-3014, AK3014 Manufactured by Pleatco, guaranteed highest quality or your money back Pleatco Part number: PMT35, PMT-35 UPC Code: 090164350004