3 Barbed with Curled Finger Connectors and 2-Pin Plug. Additional Details: Flow switch with clear tee fitting; Do not use on other models such as 800,850, 800 Series that use a square finger connection!; Part number on Flow Switch:Q12DS-C2. Used on the Following Sundance Spa Models: 780 Series, 2008+; 680 Burlington (Equipped with Circ Pump), 2008+; 680 Hartford and Hawthorne (Equipped with Circ Pump), 2007+; Hamilton, Chelsee, Certa, and Camden, 2007; 780 Palermo, Bahia, and Cayman, 2005-2006; All Sweetwater Models, 2003-2004. Used on the Following Jacuzzi Spa Models: J-300 LED Series (With Curled Finger Connectors).