Davey Spa Quip Spa Power 500 54500 SP500 500a heater element assembly. 1.5kW for 10A systems. To identify whether you have a 1.5kW or a 2.0kW element, check whether you have a 15A plug or a standard 10A plug. Standard 10A plugs will have a 1.5kW element.
The heaters sold have a wiring loom for a 500AMK2 but the loom can be changed to suit other models (54500 - 500A).
Elements come complete with a thermal overload and a temp sensor.