Jacuzzi Model Number 6600-168 Hi Limit sensor with box end connectors for all Jacuzzi J-350, J-360, J-370 and J-380 model hot tubs buil tin 2002 and 2003.
Also fits all Jacuzzi J-355, J-365, J-375 and J-385 model hot tubs built 2004 to 2006.
Replacing the Hi Limit is less common than replacing the temp sensor but failures do occur.