Diameter: 7-3/4″ Top: 4-7/8″ ; Bottom: 4-7/8″ Equivalent Filters: FC-2812 Fits all 2002 to 2005 850 Series Spas, all 2011 to 2013+ Select Series Spas and all 2013+ 780 Series Spas Replaced 6540-089 Features Fits all 2002 to 2005 850 Series Spas, all 2011 to 2013+ Select Series Spas and all 2013+ 780 Series Spas. … Sundance®/Jacuzzi® Throwaway Absorption Filter 6540-502 Read More »