This the low flow heater element used in all current model Jacuzzi J-300 series spas since the 2002 model year. There are 3 versions, a 4kw used in 110V/220V convertible models, a 5kw used in LED systems and a 5kw model used in LCD systems.
Note: The only difference in the LED and LCD versions are the wire ends. LCD systems use a screw terminal and LED systems use a spade connector.
6500-403 LCD Models (Your topside has 10 buttons)
6500-402 LED Models (Your topside displays the temerature in red)
6500-063 110V/220V Convertible for all J-310, J-315 and J-325 made in 2004 and 2008